2017 · Q44
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 ?
Elementary MathematicsTime, Speed and Distance
- A200 m
- B300 m
- C400 m
- D500 m
Explanation
Relative speed 2 km/h closes 100 m in 100/(2000/3600) = 180 s. The thief at 8 km/h covers (8000/3600) × 180 = 400 m in that time: option C.