A starts walking at 3 km/h. 5 hours after his start, B starts cycling at 8 km/h from the same point from where A started and cycle in the same direction. After how much distance (in km) will B catch up with A?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 24.
Distance covered by A in 5 hours = 3 × 5 = 15 km
Relative speed of A and B = 8 - 3 = 5 km/h
Time taken by B to catch-up with A = 15/5 = 3 h
Now, distance covered by B before catch-up with A = 8 × 3 = 24 km