Question

A train covers a distance of 60 km at the speed of 45 km/h the next 30 km distance covers with a speed of 40 km/h and last 100 km with the speed of 80 km/h find the average speed of the train?

A 36 km/hr
B 37.8 km/hr
C 41 km/hr
D 57 km/hr
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