A man covers a distance of 40km .he covers first 10km/h ,second 10km at 20 kilometre / h third 10 km at 30 km / hour and last 10 km at 40 km per hour what is the average speed of man?
Answers
Answered by
4
Answer:
first time 1 hour = 60 min
2nd time 10/20=30 min
3rd time10/30=20min
4th time 10/40 = 15 min
total time=60 min +30+20+15m=125min
total distance=4okm
average Speed of man= 40/125x60= 19.2km/h
Similar questions