A and B are tow stations. A trains goes from A to B at 64 km/hr and returns to A at a slower speed. If its average speed for the whole journey is 56 km/hr. at what speed did it return:
A and B are tow stations. A trains goes from A to B at 64 km/hr and returns to A at a slower speed. If its average speed for the whole journey is 56 km/hr. at what speed did it return:
A). 48km/hr
B). 49.77 km/hr
C). 52 km/hr
D). 47.46 km/hr
1 answers
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