How much water Saguaro Cactus can store?

How are Saguaro cactus useful?

A one side open cylinderical drum has inner radius 28 cm, and height 2.1 m .How much water you can store in the drum . Express in litres .( 1 litre= 1000cc. )

How much water at 1^@C can be converted to steam by 1 Cal heat ?

A bucket holds 1/2 litre of water. Let us calculate, how much water 7 such buckets can hold.

How much water per minute a pump of power 2 kW can reise to a height of 10 m ? (g=10 m//s^(2))

From a waterfall 60 m high, water falls at a rate of 27 m^3*s^(-1) . If 75% of energy is available at the bottom for use , how much power will be generated ? Mass of 1m^3 of water is 10^3 kg . If the power is used to lift water from a 180 m deep tubewell, how much water can be raised in 1 s?

How much is natural forest?