Question: Two men A and B start walking simultaneously from P to Q, a distance of 21 kms, at the speeds of 3 km and

Two men A and B start walking simultaneously from P to Q,

Two men A and B start walking simultaneously from P to Q, a distance of 21 kms, at the speeds of 3 km and 4 km an hour respectively. B reaches Q, returns immediately and meets A at R. Then the distance from P to R is : 1. 6 km 2. 12 km 3. 18 km 4. 24 km 5. 15 km

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