Question

A man walks at a speed of 4 km/hr. for 3hours and covers the same distance back by running at a speed of 16 km/hr. find the time taken while running?

Answer 1

Speed of man while on walk = 4 km/h
Time taken for walk = 3 h
Total distance travelled = 4 x 3 = 12 km
Speed of the man while running = 16 km/h
Distance remains same
Therefore, time taken = 12/16 = 3/4 h = 45 min