Q. Walking at the rate of 4 km/h a man covers a certain distance in 2 hours 45 min. Running at a speed of 16.5 km/h, the man will cover the same distance in
a) 40 min.
b) 55 min. 15 sec.
c) 45 min.
d) 50 min. 15 sec.
Correct Answer: a) 40 min.
Question from UPPSC Prelims CSAT 2025
Explanation:
Walking time = 2 h 45 min = 2.75 h = 11/4 h. Distance = speed × time = 4 × 11/4 = 11 km.
Running time = distance/speed = 11/16.5 h = (11)/(33/2) = 22/33 h = 2/3 h = 40 minutes.
Therefore, the man will cover the distance in 40 minutes.
