Question

how many cubic metres of earth must be dug out to sync a well which is 16 m Deep and which has a radius of 3.5 M if the earth taken out is spread over a rectangular plot of dimensions 25 into 16 What is the height of platforms are formed

Answer 1

volume of earth must be dug = volume of required well i.e. πr²h = π(3.5)².(16) ≈616m³ and the earth taken out = l×b×h; l & b is given , volume of earth has been calculated find 'h' from here.
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