A thief saw a policeman, and he started running at a speed of 18 m/s. After 12 seconds, the policeman starts running behind the thief at a certain speed. If the policeman covered 864 meters to reach the thief, then the speed (in m/s) of the policeman is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 24.
Distance covered by the thief = 216 m
Distance covered by police = 864 m
Speed ∝ Distance
Police : Theif
Distance: 864 : (864 - 216)
864 : 648
4 : 3
↓×6 ↓×6
24 m/sec 18 m/sec