In rainy season, if the hight of rain - water in 2 hectors of land be 5 metres, then the volume of rain-water is 1000 cubic - metres.

In rain y season, the heigth of reain fall in 2 herctre land is 5 cm. the volume of rain water is 1000 cubic metre.

Acid rain is caused due to the mixing of rain water with-

Describe the methodology of rain water harvesting.

The shape of a heap of wheat is a right circular cone, the diameter of base of which is 9 metres and height is 3.5 metres. Find the volume of the heap of wheat. How much sq-metre of plastic sheet will be needed to cover that heap of wheat ? [Given that pi=3.14 and sqrt(130)=11.4 ].

The length and breadth of a cuboid -shaped piece of wood are 2.3 metres and 0.75 metres respectively. If the volume of the wooden piece be 1.104 cubic-metres, then how may piece of wood of size 2.3m xx 0.75 m xx0.04m can be cut off from this piece of wood ?

A group of fire brigade personnel carried a right circular cylindrical tank filled with water and pumped out water at a speed of 420 metres per minute to put the fire in 40 minutes by three pipes of 2 cm diameter each. If the diameter of the tank is 2* 8 metres and its length is 6 metre, then calculate (a) what volume of water has been spent in putting out the fire and (b) hte volume of water that still remains in the tank .

pH of natural rain water

The volume of a right circualr cylinder varies as the square of the radius of its base , when its height is constant and as the height when the radius of the base is constant . The volume of a cylinder the radius of whose base and height are respectively 2 metres and 7 metres is 88 cubic metres . The volume and radius of the base of a cylinder are 396 cubic metres and 9 metres respectively . Detemine the height of the cylinder.

The length of radius of right circular drum is r cm and height is h cm. If half part of the drum is filled with water, then the volume of water will be pi r^(2)h cubic-cm. TRUE of FALSE

The depth of a cuboid pond with length of 20 m and breadth of 18.5 m is 3.2 m, determine the time required to irrigate whole water of the pond with a pump having the capacity to irriagate 160 kilolitres water per hour. If that quantity of water is poured on a paddy field with a ridge having the length of 59.2 m and breath of 40 m, then what is the depht of water in that land ? [Let 1 cubic metre=1 kilolitre]