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

Question

Philoid · Accepted Answer

Given,

Depth of tube well = 280 m

Diameter of tube well = 3 m

Radius of well =

so,

Volume =

Cost of sinking tubewell at rate Rs.3.60/m³ = 1980×3.60 = Rs.7128

Curved surface area =

Cost of cementing its inner curved surface at rate Rs.2.50/m² = 2.50×2640 =Rs.6600