Home Physics Transmission of Heat Radiation (Newton's Law of Cooling) A cup of tea cools from 80 to 60 in one mi…
Physics Transmission of Heat Radiation (Newton's Law of Cooling) MCQ (Single Correct)

A cup of tea cools from 80 to 60 in one minute. The ambient temperature is 30 . In cooling from 60 to 50 it will take

A
30 seconds
B
60 seconds
C
90 seconds
D
48 seconds

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Text Solution

Verified by Experts
The correct answer is:
D

From Newton's law of cooling

and

From eqn (1) and (2)

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