RRB NTPC · Question 53
A thief drives his motorcycle at a speed of x km/hr. The policemen started following him in a jeep after 4 hours and catches in 4 hours. If the average speed of jeep of policemen is 40 km/hr, then calculate the speed in km/hr for the thief’s motorcycle? A. 30 B. 36 C. 45 D. 20
Show answer & explanation
Answer: (B) D
Explanation
The thief had a 4-hour head start and was caught 4 hours after the police began, so he rode for 8 hours while the jeep drove 4 hours at 40 km/h = 160 km. So 8x = 160, and x = 20 km/h.