Question

10. Find the cost of sinking a tubewell 210 m deep, having radius 1.5 m at the rate of 33 per cubic metre.
How much will it cost in cementing the inner curved surface at 25 per square metre:
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Answer 1

Answer:

height=210

radius=1.5

rate=33

volume of the cylinder=πr^2h

=22/7*1.5*1.5*210

=1485

rate per meter=33

so

1485*33=49005rs

csa=2πrh

2*22/7*1.5*210

=1980

=

cost of cementing

=1980*52

=49500