A policeman saw a thief from distance of 300m and started running towards him. If speed of policeman and thief are 18 km/hr and 9 km/hr respectively, the distance covered by thief before he is being caught is:
Answer & explanation
Correct answer: option 3
P T
Ι------------------Ι---------------Ι
300 m
Speed (T) = 9km/h
Speed (P) = 18km/h
Relative speed = (18 - 9) km/h = 9km/h = 9 × \(\frac{5}{18}\) m/sec
Now,
Time = \(\frac{300}{{9} × \frac{5}{18}} \) = 120 sec
Distance (T) = 9 × \(\frac{5}{18}\) × 120 = 300 m