A body cools down from 75^° C to 60^° C in 10 minutes. It will cool down from 65^° C to 55^° C in a time

Q139 / 160 · AP EAMCET 2022 (05 Jul Shift 2) · Physics

A body cools down from $75^{\circ} \mathrm{C}$ to $60^{\circ} \mathrm{C}$ in 10 minutes. It will cool down from $65^{\circ} \mathrm{C}$ to $55^{\circ} \mathrm{C}$ in a time

A
10 minutes
B
Less than 10 minutes
Correct answer
C
More than 10 minutes
D
Less than or more than 10 minutes depending on its mass

Solution

From Newton's law of cooling, rate of cooling of substance is directly proportional to temperature difference with the surrounding. So as the temperature reduces, the rate of cooling decreases and time of cooling increases.

Hence, the correct answer is option: 'C'.

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