a train travels the first 15 km with a uniform speed of 30 km/hr next 10 km at uniform speed of 20 km/hr and final 75 km at a uniform speed of 50 km/hr find the average speed (i want the answer in full process)
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Heres ur answer.
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Avg speed
=(Total distance) / (total time taken)
= (15+10+75 ) / [(15/30)+(10/20)+(75/50)]
= 100/ [(1/2)+(1/2)+(3/2) ]
= 100/[5/2]
=200/5
= 40 km/h
=(Total distance) / (total time taken)
= (15+10+75 ) / [(15/30)+(10/20)+(75/50)]
= 100/ [(1/2)+(1/2)+(3/2) ]
= 100/[5/2]
=200/5
= 40 km/h
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