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Tow persons P & Q start their journey from A to B. Distance between A & B is 60 km. Speed of P is 4 km/hr less than speed of Q. Q reached at B and immediately reaturn to A and meet P at the distance of 12 km from B. Find the speed of P and Q in km/hr.

A

`5,9`

B

`6, 10`

C

`4,8`

D

`8,12`

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