[tex]{/How many cubic metres of earth must be dug out to make a well 20 m Deep and 2.8 m in diameter .Also find the cost of plastering its inner surface at ₹4.50 per square metre}[/tex]
[tex]{/How many cubic metres of earth must be dug out to make a well 20 m Deep and 2.8 m in diameter .Also find the cost of plastering its inner surface at ₹4.50 per square metre}[/tex]
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And then multiple the net price....