A bird covers first 100km at a speed of 20kmph, next 100km at a speed of 30kmph, next 100km at a speed of 40kmph and last 100km at a speed of 50kmph. Find the average speed of the bird fot the entire journey.
Answers
Answered by
3
so average speed = total distance/total time
total distane=100+100+100+100=400km
total time =distance/speed
for first 100 km speed = 100/20=5h
for next 100 km=100/30=3.33h
for next 100km=100/40=2.5h
for next 100km=100/50=2h
now averge speed = 400/5+3.33+2.5+2
400/12.83=31.17 km/h
total distane=100+100+100+100=400km
total time =distance/speed
for first 100 km speed = 100/20=5h
for next 100 km=100/30=3.33h
for next 100km=100/40=2.5h
for next 100km=100/50=2h
now averge speed = 400/5+3.33+2.5+2
400/12.83=31.17 km/h
hemaviji77pagf6m:
thank you
welcome
Similar questions