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Two cylindrical rods of same meterial have the same temperature difference between their ends. The ratio of rates of flow of heat through them is 1 : 8. The ratio of the radii of the rods are 1 : 2. What is the ratio of their lengths ?
A. `2 : 1`
B. `4 : 1`
C. `1 : 8`
D. `1 : 32`

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1 Answer

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Correct Answer - A

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