A policeman starts chasing a thief who is 500 m ahead of him. The speed of the thief is 18 km/h, and the speed of the policeman is 36 km/h. Find the time taken by the policeman to catch the thief.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 100 sec.
Given that, distance between thief anf policeman = 500 m
Speed of thief = 18 km/h
Speed of policeman = 36 km/hr
When two people run in same direction, their relative speed is equal to the difference between the individual speeds.
Relative speed of thief and policeman = 36 - 18 = 18 km/h
Relative speed of thief and policeman in m/sec = = 5 m/sec
Distance = Speed × Time
According to the given question,
Time taken = = 100 sec
Hence the time taken by policeman to catch the thief is 100 sec.