The inner diameter of circular well is 3.5 metre the depth of well is 15 metre find the cost of plastering the inner curved surface at the rate of 25 rupees per metre square
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42
Answer:
Rs.4125
Step-by-step explanation:
Diameter of Circular Well = 3.5 m
Depth of circular well = 15 m
Area to be plastered = Inner Curved Surface Area of Cylinder
= 2 × π × radius × height
= (22/7) × 3.5 × 15 [ ∵ 2×Radius = diameter = 3.5, π =22/7, height = 15 ]
= 165 m²
Cost of plastering 1 m² = Rs.25
Cost of plastering 165 m² = 25 × 165
= 4125
∴ Cost of plastering inner curved surface of well = Rs. 4125
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