an iron pipe having outer radius of 4cm is 5m long . its curved surface has to be painted . find the cost of painting it at the rate of ₹ 14 per sq.m
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Answer:
Rs. 17.6
Step-by-step explanation:
Radius of pipe = r = 4cm = 0.04 m
height of pipe = h = 5m
curved surface area of pipe = 2πrh
= 2*22/7*0.04*5
= 1.257 m²
total cost of painting = 1.257*14
= Rs.17.6
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