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The diameters of the top and the bottom portions of a bucket are 42 cm and 28 cm. If the height of the bucket is 24 cm, then find the cost of painting its outer surface at the rate of 5 paise/`cm^(2)`.A. Rs. 158.25B. Rs. 172.45C. Rs. 168.30D. Rs. 164.20 |
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Answer» Correct Answer - C CSA of a bucket `=pi l (R+r).` |
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