A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar
A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs 12.50 per m2.
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Here, r = 50 /2 cm = 25 cm = 0.25 m, h = 3.5 m
Curved surface area of the pillar = 2πrh
= 2 × 22/ 7 × 0.25 × 3.5 m2 = 5.5 m2
Cost of painting 1 m2 = Rs 12.50
∴ Total cost of painting the curved surface of the pillar
= Rs 12.50 × 5.5 = Rs 68.75 Ans
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