1.

_ A starts 3 Minutes after B for a place 4.5km distant. B, on reaching his destination, immediately returns and after walking a km meets A. If A can walk 1 Km in 18 minutes,then what is B's speed?$?

A. 4 km/h
B. 6 km/h
C. 7 km/h
D. 5 km/h
Answer» E.


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