A thief is noticed by a policeman from a distance of 97 m. The thief starts running and the policeman chases him. The thief and the policeman run at a speed of 21 m/sec and 23 m/sec respectively. What is the time taken by the policeman to catch the thief?

48.5 sec

Distance between policeman and thief = 97 m

Speed of Thief = 21 m/sec & speed of policeman = 23 m/sec

Relative speed = 23 - 21  = 2 m/sec

Time taken by policeman to caught the thief = \(\frac{97}{2}\) = 48.5 sec