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 .
Answers (1)
Solution: We have ,
volume of earth to be dug out = Volume of the well