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Asked by Abraham

Feb 4, 2015

Three cubes each of side 5 cm are joined to the end. find the surface area of the resultant cuboid.


Three cubes each of side 5 cm are joined to the end. find the surface area of the resultant cuboid.

Answers(2)

Answer

Raghunath Reddy

Member since Apr 11, 2014

Sol:

Given, each side of the cube is 5 cm.

When three cubes are joined end to end, then the resulting solid is a cuboid.

Length of the cuboid, l = 2 × each side of the cube = 2 × 5 cm = 10 cm

Breadth of the cuboid, b = each side of the cube = 5 cm

Height of the cuboid, h = each side of the cube = 5 cm

Surface area of the cuboid

= 2 (lb + bh + hl)

= 2 (10 cm × 5 cm + 5 cm × 5 cm + 5 cm × 10cm)

= 2 (50 cm2 + 25cm2 + 50 cm2)

= 2 × 125 cm2.

= 250 cm2.

Thus, the surface area of the resulting cuboid is 250 cm2.

Rahul

Member since

It means joining three cubes length would be 15 nd b=5, h=5, Then calculate the surface area by using 2 (lb+bh+hl) formula
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