A thief is noticed by a policeman from a distance of 450 m. The thief starts running and the policeman chases him . The thief and the policeman run at therate of 10 km/h and 12 km/h , respectively . Whatwill be the distance between them after 3 minutes?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 350 m.
Thief's speed = 10.5 km/h = 10.5 × 1000 ÷ 60 = 175 m/min
Policeman's speed = 12.5 km/h = 12.5 × 1000 ÷ 60 = 208.33 m/min
Difference in speed = 208.33 - 175 = 33.33 m/min
Time = 3 minutes
Distance closed in 3 minutes = 33.33 × 3 ≈ 100 m
Initial distance = 450 m
Distance after 3 minutes = 450 - 100 = 350 m