Correct Answer - Option 3 : 100m
Given:
Policeman notices a thief from a distance = 500 m.
Policeman run at the rate of 12 km/hr
And thief run at the rate of 10 km/hr
Distance covered time = 12 minutes
Formula used:
Distance = speed x time
Calculation:
Relative speed = (12 - 10)km/hr = 2 km/hr
Time = 12 minutes = 12/60 hr = 1/5 hr
So, Distance covered in 12 minutes = Speed × Time = 2x(1/5) = 2/5 km = 400 m.
⇒ Distance between the thief and policeman = (500 - 400) = 100 m.
∴ After 12 minutes distance between thief ans policeman is 100 m.