A cube and a sphere of the same material have the same volume. Find the ratio of the surface area of the cube to that of the sphere (two decimals). The one with the larger area cools faster.

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TestHub · Accepted Answer

For volume V the cube has area 6 V 3 2 ​ . The sphere has r 3 = 4 π 3 V ​ and area 4 π r 2 = 3 36 π ​ V 3 2 ​ . Ratio = 3 36 π ​ 6 ​ = 1.24 .

Physics - Heat & Thermo Question with Solution | TestHub

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