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 dogout to sink a well 21 m deep and 6m diameter? Find the cost of plastering the inner surface of the well of Rs.9.50 per m^(2)

How many cubic metres of earth must be dogout to sink a well 21m deep and 6m diameter? Find the cost of plastering the inner surface of the well of Rs. 9. 50\ p e r\ m^2dot

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?

How many cubic metres of earth must be dug out to sink a well 22.5m deep and of diameter 7m? Also, find the cost of plastering the inner curved surface at Rs. 3 per square metre.

How many cubic metres of earth must be dug out to sink a well 22.5m deep and of diameter 7m? Also,find the cost of plastering the inner curved surface at Rs.3 per square metre.

How many cubic metres of earth must be dug out to sink a well 22.5m deep and of diameter 7m? Also, find the cost of plastering the inner curved surface at Rs. 3 per square metre.

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 make a well 14 m deep and 4m in diameter ?

How many cubic metres of earth must be dug out to make a well 28 m deep and 2.8 m in diameter ? Also, find the cost of plastering its inner surface at Rs 4.50 per sq. metre.