1.

A man completes 30 km of a journey at the speed of 6 km/hr and the remaining 40 km of the jour-ney in 5 hours. His average speed for the whole journey is

A. 7 km/hr
B. 6[4/11]km/hr
C. 8 km/hr
D. 7.5 km/hr
Answer» B. 6[4/11]km/hr


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