A man completes 30 km of a journey at 6 km/h and the remaining 40 km of the journey in 5h. Find the average speed for the whole journey.

A man completes 30 km of a journey at 6 km/h and the remaining 40 k

1.	A man completes 30 km of a journey at 6 km/h and the remaining 40 km of the journey in 5h. Find the average speed for the whole journey.
A.	6 km/h
B.	7 km/h
C.	7 (1/2) km/h
D.	8 km/h
Answer» C. 7 (1/2) km/h

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A man completes 30 km of a journey at 6 km/h and the remaining 40 km of the journey in 5h. Find the average speed for the whole journey.

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