a train travels a distance of 20 km with a uniform speed of 60 kmph. it travels another 40 km with a uniform speed of 60 kmph. find its average speed
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Answer:
68.9km/hr
Explanation:
Time taken to travel 20 km at 60km/hr, t1=20/60=0.33hr
time taken to travel nxt 20 km at 80km/hr, t2=20/80=0.25hr
total distance=40 km
total time=0.58 hr
avg speed=total distance travelled / total time taken=40/0.58=68.96km/hr
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