How many cubic metres of Earth must be dug to construct a well 14 m deep and of diameter 1.8 m? [2 marks]
How many cubic metres of earth must be dugout to sink a well 21 m deep and 6 m diameter? Find the cost of plastering the inner surface of the well at Rs. 9.50 per m2.
Question 89
How many cubic meters of Earth must be dug to construct a well 7 m deep and of diameter 2.8 m?