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Harmanpreet

May 3, 2014

Want solution to this question.....

This answer has an image. Please click on the question to read more.

Rita

Feb 8, 2015

Find the area of a circle circumscribing an equilateral triangle of side 15 cm.

This answer has an image. Please click on the question to read more.

Devanshi Kulkarni

Jan 2, 2015

The length of minute hand of a clock is 14 cm. Find the area swept by the minute hand in 15 minutes.

Given, radius of the minutes hand= 14cm

In 15 minutes, the minutes hand of the clock rotates by 90Â°.

âˆ´ Area cove...

In 15 minutes, the minutes hand of the clock rotates by 90Â°.

âˆ´ Area cove...

Devanshi Kulkarni

Jan 2, 2015

Calculate the total length of the metal wire required to make a set of ear-rings.

Sol:

Length of the wire in the shape of smaller arc = perimeter of the semicircle with diamter of 14 mm

= 1/2 [ 2 x 22/7 x 7]

= 22 mm

Length of the wire in the shape of longer arc = ...

Length of the wire in the shape of smaller arc = perimeter of the semicircle with diamter of 14 mm

= 1/2 [ 2 x 22/7 x 7]

= 22 mm

Length of the wire in the shape of longer arc = ...

Chayan Mukherjee

Apr 2, 2014

1. A car takes one hour to cover 47.52 km. If the diameter of its wheels is 84 cm, find the number of revolutions made by a wheel in one second.

2. The minute hand of a clock traces an area 51â…“ cm^{2 }in 20 minutes. Find the length of the minute hand.

3. A thin wire 66 m long is bent in the form of a circle and kept on the ground. Find the area of the ground enclosed by the wire.

4. A piece of wire when bent to form of a circle will have a radius of 84 cm. if the wire is bent to form a square, what would be the length of a side of the square.

5. A path of uniform width encloses a circular field. The external and the internal perimeters of the path are 500 m and 300 m. Find the width of the path.

6. A circular pond of diameter 40 m is surrounded by 5 m broad pathway. Find the area of the path.

7. A horse is tethered at the corner of a rectangular field by a rope 7 m long. Find the largest area of the field in which the horse can graze.

8. From the four corners of a square paper of side 24 cm, quarter circles with centres at the vertices of the square are cut off. If the radius of each of the quarter is 7 cm, find the area of the paper left.

9. From the three corners of a triangular paper, each side of which is 2k cm long, sectors of circles of the radius k cm are cur off with centre at vertices of the triangle. What portion of the paper is left?

10. A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm. Given that the bucket ascends in 1 minutes 28 seconds with a uniform speed 1.1 m/s, calculate the number of complete revolutions the wheels makes in raising the bucket. ( Take Ï€ = 22/7)

2. The minute hand of a clock traces an area 51â…“ cm

3. A thin wire 66 m long is bent in the form of a circle and kept on the ground. Find the area of the ground enclosed by the wire.

4. A piece of wire when bent to form of a circle will have a radius of 84 cm. if the wire is bent to form a square, what would be the length of a side of the square.

5. A path of uniform width encloses a circular field. The external and the internal perimeters of the path are 500 m and 300 m. Find the width of the path.

6. A circular pond of diameter 40 m is surrounded by 5 m broad pathway. Find the area of the path.

7. A horse is tethered at the corner of a rectangular field by a rope 7 m long. Find the largest area of the field in which the horse can graze.

8. From the four corners of a square paper of side 24 cm, quarter circles with centres at the vertices of the square are cut off. If the radius of each of the quarter is 7 cm, find the area of the paper left.

9. From the three corners of a triangular paper, each side of which is 2k cm long, sectors of circles of the radius k cm are cur off with centre at vertices of the triangle. What portion of the paper is left?

10. A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm. Given that the bucket ascends in 1 minutes 28 seconds with a uniform speed 1.1 m/s, calculate the number of complete revolutions the wheels makes in raising the bucket. ( Take Ï€ = 22/7)

Sol :

Post each question individually to get quick answer.

Post each question individually to get quick answer.

Fahad Kolharkar

Dec 12, 2014

what is the minimum area of a right-angled triangle whose inradius is 1 unit?

This answer has an image. Please click on the question to read more.

Devanshi Kulkarni

Jan 5, 2015

Find the area of the shaded region.

Sol:

Area of unshaded region of quadrant of a square = [Area of two quadrants - Area of the quadrant of the square]

= 2[1/4 x 22/7 x 7 x 7] - [7 x 7]

= 77 - 49

= 28

To...

Area of unshaded region of quadrant of a square = [Area of two quadrants - Area of the quadrant of the square]

= 2[1/4 x 22/7 x 7 x 7] - [7 x 7]

= 77 - 49

= 28

To...

Devanshi Kulkarni

Jan 2, 2015

Prove that i) âˆ CED=3âˆ CBD ii) CD=DA

Sol:

(i) Let âˆ CBD = x.

âˆ COD = 2x [Angle made by arc at the centre is twice the angle made by it at any point on the remaining part of the circle.]

âˆ OCD = 2x [Alternate ang...

(i) Let âˆ CBD = x.

âˆ COD = 2x [Angle made by arc at the centre is twice the angle made by it at any point on the remaining part of the circle.]

âˆ OCD = 2x [Alternate ang...

Devanshi Kulkarni

Jan 2, 2015

In the figure there are 5 squares each of side 2 cm.

(i) Find the radius of the circle.

(ii) Find the area of the shaded region ( Take Ï€=3.14)

(i) Find the radius of the circle.

(ii) Find the area of the shaded region ( Take Ï€=3.14)

Please draw the figure and post it.

(1) radius of the vessel.

(2) height of the vessel.

(3) wetted surface area of the vessel when it is half-filled with water.

No answers yet.Be the first to answer

Harmanpreet

May 3, 2014

Want solution to this question.....

This answer has an image. Please click on the question to read more.

Rita

Feb 8, 2015

Find the area of a circle circumscribing an equilateral triangle of side 15 cm.

This answer has an image. Please click on the question to read more.

Devanshi Kulkarni

Jan 2, 2015

The length of minute hand of a clock is 14 cm. Find the area swept by the minute hand in 15 minutes.

Given, radius of the minutes hand= 14cm

In 15 minutes, the minutes hand of the clock rotates by 90Â°.

âˆ´ Area cove...

In 15 minutes, the minutes hand of the clock rotates by 90Â°.

âˆ´ Area cove...

Devanshi Kulkarni

Jan 2, 2015

Calculate the total length of the metal wire required to make a set of ear-rings.

Sol:

Length of the wire in the shape of smaller arc = perimeter of the semicircle with diamter of 14 mm

= 1/2 [ 2 x 22/7 x 7]

= 22 mm

Length of the wire in the shape of longer arc = ...

Length of the wire in the shape of smaller arc = perimeter of the semicircle with diamter of 14 mm

= 1/2 [ 2 x 22/7 x 7]

= 22 mm

Length of the wire in the shape of longer arc = ...

Chayan Mukherjee

Apr 2, 2014

1. A car takes one hour to cover 47.52 km. If the diameter of its wheels is 84 cm, find the number of revolutions made by a wheel in one second.

2. The minute hand of a clock traces an area 51â…“ cm^{2 }in 20 minutes. Find the length of the minute hand.

3. A thin wire 66 m long is bent in the form of a circle and kept on the ground. Find the area of the ground enclosed by the wire.

4. A piece of wire when bent to form of a circle will have a radius of 84 cm. if the wire is bent to form a square, what would be the length of a side of the square.

5. A path of uniform width encloses a circular field. The external and the internal perimeters of the path are 500 m and 300 m. Find the width of the path.

6. A circular pond of diameter 40 m is surrounded by 5 m broad pathway. Find the area of the path.

7. A horse is tethered at the corner of a rectangular field by a rope 7 m long. Find the largest area of the field in which the horse can graze.

8. From the four corners of a square paper of side 24 cm, quarter circles with centres at the vertices of the square are cut off. If the radius of each of the quarter is 7 cm, find the area of the paper left.

9. From the three corners of a triangular paper, each side of which is 2k cm long, sectors of circles of the radius k cm are cur off with centre at vertices of the triangle. What portion of the paper is left?

10. A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm. Given that the bucket ascends in 1 minutes 28 seconds with a uniform speed 1.1 m/s, calculate the number of complete revolutions the wheels makes in raising the bucket. ( Take Ï€ = 22/7)

2. The minute hand of a clock traces an area 51â…“ cm

3. A thin wire 66 m long is bent in the form of a circle and kept on the ground. Find the area of the ground enclosed by the wire.

4. A piece of wire when bent to form of a circle will have a radius of 84 cm. if the wire is bent to form a square, what would be the length of a side of the square.

5. A path of uniform width encloses a circular field. The external and the internal perimeters of the path are 500 m and 300 m. Find the width of the path.

6. A circular pond of diameter 40 m is surrounded by 5 m broad pathway. Find the area of the path.

7. A horse is tethered at the corner of a rectangular field by a rope 7 m long. Find the largest area of the field in which the horse can graze.

8. From the four corners of a square paper of side 24 cm, quarter circles with centres at the vertices of the square are cut off. If the radius of each of the quarter is 7 cm, find the area of the paper left.

9. From the three corners of a triangular paper, each side of which is 2k cm long, sectors of circles of the radius k cm are cur off with centre at vertices of the triangle. What portion of the paper is left?

10. A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm. Given that the bucket ascends in 1 minutes 28 seconds with a uniform speed 1.1 m/s, calculate the number of complete revolutions the wheels makes in raising the bucket. ( Take Ï€ = 22/7)

Sol :

Post each question individually to get quick answer.

Post each question individually to get quick answer.

Fahad Kolharkar

Dec 12, 2014

what is the minimum area of a right-angled triangle whose inradius is 1 unit?

This answer has an image. Please click on the question to read more.

Devanshi Kulkarni

Jan 5, 2015

Find the area of the shaded region.

Sol:

Area of unshaded region of quadrant of a square = [Area of two quadrants - Area of the quadrant of the square]

= 2[1/4 x 22/7 x 7 x 7] - [7 x 7]

= 77 - 49

= 28

To...

Area of unshaded region of quadrant of a square = [Area of two quadrants - Area of the quadrant of the square]

= 2[1/4 x 22/7 x 7 x 7] - [7 x 7]

= 77 - 49

= 28

To...

Devanshi Kulkarni

Jan 2, 2015

Prove that i) âˆ CED=3âˆ CBD ii) CD=DA

Sol:

(i) Let âˆ CBD = x.

âˆ COD = 2x [Angle made by arc at the centre is twice the angle made by it at any point on the remaining part of the circle.]

âˆ OCD = 2x [Alternate ang...

(i) Let âˆ CBD = x.

âˆ COD = 2x [Angle made by arc at the centre is twice the angle made by it at any point on the remaining part of the circle.]

âˆ OCD = 2x [Alternate ang...

Devanshi Kulkarni

Jan 2, 2015

In the figure there are 5 squares each of side 2 cm.

(i) Find the radius of the circle.

(ii) Find the area of the shaded region ( Take Ï€=3.14)

(i) Find the radius of the circle.

(ii) Find the area of the shaded region ( Take Ï€=3.14)

Please draw the figure and post it.

(1) radius of the vessel.

(2) height of the vessel.

(3) wetted surface area of the vessel when it is half-filled with water.

No answers yet.Be the first to answer