how many cubic metre of earth must be dug out to sync a well of 22.5 M Deep and diameter 7 also find the cost of plastering the inner curved surface at rupees 3 per square metre
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1)866.25m³ of earth to be dugout from well
2)total cost for plastering of inner curved surface area of the well =Rs.1485
total plastering of inner curved surface area of the well=495m²
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