A man travels first 50 km at 25 km/h, next 40 km at 20 km/h and then 90 km at 15 km/h. His average speed for the whole journey (m/s) is -

A man travels first 50 km at 25 km/h, next 40 km at 20 km/h and then 9

1.	A man travels first 50 km at 25 km/h, next 40 km at 20 km/h and then 90 km at 15 km/h. His average speed for the whole journey (m/s) is -
A.	18 m/s
B.	5 m/s
C.	10 m/s
D.	36 m/s
Answer» C. 10 m/s

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A man travels first 50 km at 25 km/h, next 40 km at 20 km/h and then 90 km at 15 km/h. His average speed for the whole journey (m/s) is -

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