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The heat is flowing through two cylindri...

The heat is flowing through two cylindrical rods of same material. The diameters of the rods are in the ratio `1:2` and their lengths are in the ratio `2:1`. If the temperature difference between their ends is the same, the ratio of rate of flow of hest through them will be

A

1:1

B

2:1

C

0.044444444444444

D

1:8

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