A walk at 4 km/hr and and 4 hour after his start, B cycle after him at him at 10 km/hr. How far from the start does B catch up with A?
A. 16.7km
B. 18.6 km
C. 21.5 km
D. 26.7 km
Answer: Option D
Solution (By Examveda Team)
A walks for 4 hours, at 4 km/hr, giving them a 16 km head start. Let t be the time it takes for B to catch up. Then:10t=4t+16
6t=16
t=16/6
=8/3 hours
8/3 x 10=26.67 kilometers
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