Question

Two men start from points a and b respectively,42 km apart.one walks from a to b at 4km/hr and another walks from b to a at a certain uniform speed.they meet each other after 6hours the speed of the second man is?

Answer 1

here is your answer
total distance is 42 km
one walks a to b at 4km per hour
so after 6 hour he traveled = 4*6=24 km
so second man travelled in 6 hour is =42-24=18 km
in 6 hour second man travelled =18 km
in 1 hour second man travelled =18/6 = 3
so answer is = 3km per hour