Two balls of same material and finish have their dia... - Solved MCQs & Answer

1007Mechanical EngineeringMedium

Two balls of same material and finish have their diameters in the ratio of 2 : 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of________?

A4 : 1

B1 : 2

C2: 1

D1 :1

E1 : 4

Correct answer

B. 1 : 2

Explanation

The correct answer is 1 : 2.

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