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Ratio between curved surface area and total surface area of a circular cylinder is 3 : 5. If curved surface area is `7392 cm^3` then what is the height of cylinder.A. 48B. 21C. 47D. 42 |
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Answer» Correct Answer - D According to question, `(2pirh)/(2pir(r+h))=3/5` `5h=3r+3h` `2h=3r and 2pirh=7392` `2xx22/7xx2/3hxxh=7392` `h=42` `:." Height of cylinder "=42 cm` |
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