Q208
A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large.
A.
5 minutes
AnswerB.
10 minutes
C.
20 minutes
D.
40 minutes
Answer: Option A
Solution
Answer: Option A
No explanation is given for this question Let's Discuss on Board