How many cubic metres of earth must be dug out to sink a well 14 m deep and having a radius of 4 m. If the earth taken out is spread over a plot of dimension `(25 m xx 16 m)`. What is the height of the plateform so formed?

How many cubic metres of earth must be dug-out to sink a well 21m deep and 6m diameter?

How many cubic metres of earth must be dug-out to sink a well 21m deep and 6m diameter?

How many cubic metres of earth must be dug to make a well 14 m deep and 4m in diameter ?

How many cubic metres of earth must be dug to sink a wll 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 25mxx16m , what is the height of the platform so formed?

How many cubic meters of earth must be dug out to sinc a well 20m deep and has a diameter of 7m ? If the earth so dug out spread over a rectangular plot of 25m by 11m, What is height of the platform so formed?

How many cubic metres of earth must be dug to construct a well 7 m deep and of diameter 2.8 m?

How many cubic metre of earth is to be dug out to dig a well of radius 1.4m and depth 5m ?

How many cubic metres of earth must be dug to construct a 7 m deep wel and diametrt is 2 m ?

How many cubic metres of earth must be dug out to sink a well 14 m deep and 4 m in diameter? What will it cost to plaster its inner surface at Rs 2.50 per square metre?