A thief is observed by a policeman from a distance of 420 m. The thief starts running and the policeman chases him. The policeman and the thief run at a speed of 25 km/h and 20 km/h, respectively. What is the distance between them after three minutes?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 170 m.
A policeman observes a thief from a distance of 420 meters
Assuming the speed of the policeman is 25 km/h and that of the thief is 20 km/h
Relative speed of the thief and the policeman, = 25 km/hr - 20 km/hr = 5 km/hr = 5 × 50/3 m/min = 250/3 m/min
Time = 3 min
Distance covered in 3 minutes = 250/3 × 3 = 250 m
Distance between them after three minutes = 420 - 250 = 170 m