A policeman spots a thief at a distance of 200 m and starts chasing him. While the policeman runs at a speed of 9 km/ h, the thief runs at a speed of 7 km/ h. After how long will the policeman catch the thief?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e.6 minutes
As per the questions, the thief is 200 m ahead of the policeman when the policeman started running for catching him. The speed of the policeman is 2 km/h (9 - 7=2) more than the thief.
So , 1000m = 1km
1m = 0.001km
200m = 0.2km
time is taken by the policeman to catch the thief = distance between policeman and thief initially/ effective speed
= 0.2/2
= 0.1 hour
1 hour = 60 minutes
So 0.1 hour = 6 minutes