Find the cost of sinkind a tubewell 210 m deep ,having radius 1.5m at the rate of ₹3 per cubic metre.how much will it cost in cementing the inner curved surface at ₹25 per square metre?
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volume of firewall => 22/7*1.5*1.5*210
=> 1,485m^3
therefore cost => 1,485*3 => rs.4455
and curved surface area => 2*22/7*1.5*210
=>1980m^2
therefore cost => 1980*25 => rs.49500
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=> 1,485m^3
therefore cost => 1,485*3 => rs.4455
and curved surface area => 2*22/7*1.5*210
=>1980m^2
therefore cost => 1980*25 => rs.49500
please mark as brainliest
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