A thief is noticed by a policeman from a distance of 200 m. The thief starts running and the policeman chases him. The thief and the policeman run at the rate of 10 km/h and 11 km/h, respectively. What is the distance (in metres) between them after 9 minutes?

Options
a) 50
b) 40
c) 60
d) 30

Solution

As per question
Distance = Speed x Time
Relative speed of thief and policeman = 10 km/h – 11 km/h = 1 km/h
Distance covered in 9 minutes = 1 x 9/60 = 9/60 km
Distance covered in meter = = 150
Distance between thief and policeman = 200 – 150 = 50

Answer: 50