A thief is 2,000 metres ahead of a policeman when the policeman starts a chase by running at 20 m/s. If the thief is running at 12 m/s, then find the time taken by the policeman to catch the thief.
Show answer & explanation
Correct answer: C
Explanation
Given:
Speed of the policeman = 20 m/s
Speed of the thief = 12 m/s
Initial distance = 2000 m
By the formula:
Time = Distance / Relative speed
Relative speed = 20 − 12 = 8 m/s
Time = 2000 / 8 = 250 seconds