9. The inner diameter of a circular well is 3.5 m. The depth of the well is 15 m. Find the cost of plastering
the inner curved surface at the rate of 25 per m2.
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Answer:
4125 ₹
Step-by-step explanation:
diameter = 3.5 m
radius = 3.5/2 m
depth or height = 15 m
CSA OF CYLINDER = 2πrh
= 2(22/7)(3.5/2)15
= 165 m²
Total cost of plaster = 165×25₹
=4125₹
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