A train travels some distance with a speed of 30 km/hr and returns with a speed 45km/hr what is its average speed???
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suppose train travels x kms in hour
with the speed of 30km /hour in South side
now its returns the same distance x kms with
the speed of 45 km/hour in West
its distance total =2x
average is total of distance its 30km/60 min
+45 km/60 min
=(30+45)km/2hour
=75/2
=37.5 km/hour
with the speed of 30km /hour in South side
now its returns the same distance x kms with
the speed of 45 km/hour in West
its distance total =2x
average is total of distance its 30km/60 min
+45 km/60 min
=(30+45)km/2hour
=75/2
=37.5 km/hour
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