Transmission Of Heat Question 195
Question: The temperature of a body falls from 62oC to 50oC in 10 minutes. If the temperature of the surroundings is 26oC, the temperature in next 10 minutes will become
[RPMT 2002]
Options:
A) 42oC
B) 40oC
C) 56oC
D) 55oC
Show Answer
Answer:
Correct Answer: A
Solution:
$ \frac{62-50}{10}=K( \frac{62+50}{2}-26 ) $
Therefore $ \frac{6}{5}=K\times 30 $
Therefore $ K=\frac{1}{25} $ And, $ \frac{50-\theta }{10}=\frac{1}{25}( \frac{50+\theta }{2}-26 ) $
Therefore $ \theta =42{}^\circ $ C.
BETA
