A person goes to his office at 1/4th of the speed at which he returns from his office. If the average speed during the whole trip is 15 km/h, then what is the speed of the person while he was going to his office?

A person goes to his office at 1/4th of the speed at which he returns

1.	A person goes to his office at 1/4th of the speed at which he returns from his office. If the average speed during the whole trip is 15 km/h, then what is the speed of the person while he was going to his office?
A.	15/2 km/h
B.	17/3 km/h
C.	75/8 km/h
D.	9 km/h
Answer» D. 9 km/h

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A person goes to his office at 1/4th of the speed at which he returns from his office. If the average speed during the whole trip is 15 km/h, then what is the speed of the person while he was going to his office?

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