Question

Find the cost of sinking a tube well 280m deep having diameter 3m at the rate of rs 3.60 per cubic metre.find also the cost of centimenting its inner curved surface at rs 2.50per square metre.

Answer 1

Answer:

Since tube well is of the shape of cylinder

therefore volume of tubewell is equal to volume of tubewell.

Volume=πr²h

=π×1.5²×280

=1979.2 m³

now, cost of sinking [email protected]/m³

therefore, cost is equal to (3.6×1979.2)

rs7125.12

Curved surface area (CSA)=2πrh

2×π×1.5×280

2640m²

cost of cementing is@ 2.5m²

therefore, total cost is (2.5×2640)

rs6600