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Ram Sharma • 193.88K Points
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Q. 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
  • (B) 10 minutes
  • (C) 20 minutes
  • (D) 40 minutes
  • Correct Answer - Option(A)
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  • Filed under category Heat Transfer
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