A starts walking at 4 kmph and 4 hours after his start B starts cycling at 10 kmph. After how much distance will B catch up with A?
Answer: D
Distance travelled by each of them is to be made equal.
=> Distance travelled walking = Distance covered cycling.
Let after 4 hours of walking, A walk for x hours more before B catches up with him.
=> Distance = Speed * Time
(4+x)4 = 10x
x = 8/3
Therefore, It takes B 8/3 hours to catch up with A. Distance: 8/3 x 10 = 80/3 km = 26.67