1.

A boy goes three equal distance, each of length x km, with speed of y km/hr, $$\frac{3\text{y}}{5}$$ km/hr and $$\frac{2\text{y}}{5}$$ respectively. If the total time taken is 1 hour, then x : y is equal to :

A. : 13
B. : 23
C. : 31
D. : 37
Answer» D. : 37


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