Q37 of 62 Page 22

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.

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


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