Q7 of 76 Page 18

The breadth of a room is twice its height, one half of its length and the volume of the room is 512 cu. Dm. Find its dimensions.

Given,


Breadth of room = 2×height of room = b = 2×h = h =


Breadth of room =


Volume of room = 512 dm3


= l×b×h = 512


= 2b×b×


= b3 = 512 = b =


So, breadth of room = 8 dm


Length of room = 2b = 2×8 = 16 dm


Height of room =


More from this chapter

All 76 →
5

The areas of three adjacent faces of a cuboid are x, y, and z. If the volumes is V, prove that V2 = xyz.

 6

If the areas of three adjacent faces of a cuboid are 8 cm2, 18 cm2 and 25 cm3. Find the vlume of the cuboid.

 8

A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea ina minute?

 9

Water in a canal 30 dm wide and 12 dm deep, is flowing with a velocity of 100 km per hour. How much area will it irrigate in 30 minutes if 8 cm of standing water is desired?