A and B started their journeys from X an...

A and B started their journeys from X and Y and Y to X, respectively. After crossing each other. A and B completed the remaining parts of their journeys in `6 1/8` and 8 h respectively . If speed of B is 28km/h , then the speed (in km/h) of A is

A - `40`

B - `42`

C - `32`

D - `36`

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