A thief is spotted by a policeman from a distance of 100 m. When the policeman starts the chase, the thief also starts running. If the speed of the thief is 8 km/hour and that of the policeman is 10 km/hour, then how far will the thief have to run before he is overtaken?
Let the distance covered by thief is d.
Distance covered by policeman = d + 100
Time is same for the thief and policeman.
d/8 = (d+100)/10
10d = 8d + 800
2d = 800
d = 400
The correct option is C.