Question

A person travels equal distance with speeds of 3km/hr, 4km/hr and 5km/hr and takes a total time of 47minutes .Find the total distance in km

Answer 1

Answer:

3 km

Explanation:

Time taken to travel first part of total distance=x/3/3=x/9

Time taken to travel second part of total distance=x/3/4=x/12

Time taken to travel third part of total distance=x/3/5=x/15

Total time taken=x/9+x/12+x/15=20x+15x+12x/180=47x/180

Average speed=total distance/total time

                         =x/47x/180=180x/47x=180/47

Total distance=speed*time taken

                       =180/47*47/60=3km