Properties Of Solids And Liquids Question 50
Question: The weight of a person is 60 kg. If he gets 105 calories heat through food and the efficiency of his body is 28%, then upto how much height he can climb (approximately) [AFMC 1997]
Options:
A) 100 m
B) 200 m
C) 400 m
D) 1000 m
Show Answer
Answer:
Correct Answer: B
Solution:
Suppose person climbs upto height h, then by using $ W=JH $
therefore $ mgh=JQ $
therefore $ 60\times 9.8\times h=4.2\times ( 10^{5}\times \frac{28}{100} ) $
therefore $ h=200m $
