A hot body is allowed to cool. The surrounding temperature is constant at 30 °C. The body takes time $ t_1 $ to cool from 90 °C to 89 °C and time $ t_2 $ to cool from 60 °C to 59.5 °C. Then,

Question

$ t_2 = 2t_1 $

$ t_2 = \frac{t_1}{2} $

$ t_2 = 4t_1 $

$ t_2 = t_1 $

Solution

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