Question: Two persons, 27 km apart, setting out at the same time are together in 9 hours if they walk in the same direction, but in

Two persons, 27 km apart, setting out at the same time are together in 9 hours if they walk in the same direction, but in 3 hours if they walk in opposite directions. What are their speeds (in km/h)?

(a) 5, 4

(b) 4, 3

(c) 6, 3

(d) 8, 7

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