A train travels a distance of 20 km with a uniform speed of 60 km/h. it travels another 40 km with a uniform speed of 80km/h. calculate the average speed of train.
please give the answer with steps.
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79
total distance=20 +40=60km
Time 1=20/60=1/3
time 2=40/80=1/2
avg.speed=total distance/total time
=60/1/3+1/2
=72km/h
Time 1=20/60=1/3
time 2=40/80=1/2
avg.speed=total distance/total time
=60/1/3+1/2
=72km/h
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24
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