A boy goes three equal distances, eac...

A boy goes three equal distances, each of length km, with a speed of `y` km/hr`,(3y)/5\ \ k m//h r` and `(2y)/5` km/hr respectively. If the total tie taken is 1 hours, then `x : y` is equal to `6: 13` b. `6: 23` c. `6: 31` d. `6: 37`

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