find the cost of digging a pit (to form a well) of diameter 3m and depth 21 m at the rate of ruppees 5 per m³
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Answer:
cost = volume x rate
volume = πr²h=22/7 x 3/2 x 3/2 x 21
=148.5m²
cost=148.5 x 5
=742.5 Rupees
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