1.

The distance between P and Q along a river is 120km. The speed of the river current is 3km/hr from P to Q. A boat takes 10 hrs to travel from P to Q. Whal time will it take to return from Q to P ?

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The distance between P and Q along a river is 120km. The speed of the river current is 3km/hr from P to Q. A boat takes 10 hrs to travel from P to Q. Whal time will it take to return from Q to P ?



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