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Oct 11, 2013

Find the length of the longest rod that can be placed in a room 12 m long, 9 m broad and 8 m high.



Given length l = 12 m
breadth b = 9 m and height h = 8 m
Longest rod that can be placed in a room is nothing but its diagonal.<...

Jan 9, 2014

A cone ,hemisphere and a cylinder stand on equal base and have same height .then ratio of their volume is? Show it.



Volume of cone = (1/3)Ï€r2h
Volume of hemisphere = (2/3)

Feb 27, 2014

Q. A semi circular sheet of metal of diameter 28 cm is bent into an open conical cup. Find the depth and capacity of cup.



Given diameter = 28 cm
Circumference of semi circle = Ï€r
= (22/7) x 14 = 44 cm
This becomes circumference of base of cone
2



Let

Oct 16, 2013

The outer dimensions of a closed wooden box are 10 cm by 8 cm by 7 cm. Thickness of the wood is 1 cm. Find the total cost of wood required to make box if 1 cmÂ³ of wood cost â‚¹2.00



Given outer length = 10 cm
Outer height = 7 cm
Outer volume = length Ã— breadth Ã— height
= 10 Ã— 8 ...

Feb 4, 2015

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



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,

Mar 1, 2014



Mar 9, 2015

The length of longest pole that can be put in a room of dimensions (10m x 10m x 5m) is _________.



Length of the longest pole that can be put in a room = Length of the diagonal inside the room

Length of the diagonal = $<...$

Nov 29, 2014



l*b*h