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CSS Solved Papers
Physics Chemistry

Engineering :: Heat Transfer

  A body cools from 90?C to 80?C in 5 minutes. Under the same external conditions to cool from 80?C to 70?C the body will take
[A]. 5 minutes[B]. 4 minutes
[C]. 2.5 minutes[D]. More than 5 minutes
[E]. Cannot be predicted    

Answer: Option D
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