Question

At a exactly afternoon, 'A' started to walk at 6km/hr and at 13 : 30 p.m. 'B' follows by running at 8km/hr. When will 'B' overtake 'A'. Also find...

1] When 'A' is 5 km ahead of 'B'.

2] When 'A' is 3 km behind the 'B'.​

Answer 1

A walks for 3.5 hours, at 6 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=80/3 kilometers