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In a building, there are 24 cylindrical pillars. For each pillar, radius is 28 m and height is 4 m. Find the total cost of painting the curved surface area of the pillars at the rate of ₹ 8 per m2. |
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Answer» Radius (r) of each pillar = 28 m Height (h) = 4 m Curved surface area of each pillar = 2πrh = 2 x 22/7 x 28 x 4 m2 = 704 m2 Surface area of 24 pillars = 704 x 24 m2 = 16,896 m2 Cost of cleaning = Rs. 8 per m2 Total cost = Rs. 16,896 x 8 = Rs. 1, 35, 168 |
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