Two swimmers start at the same moment from the two ends of a 2.4 km stretch of river and swim towards each other. Each swims at 3 km/h in still water and the current is 1 km/h. How far from the upstream end do they meet?

Question

Accepted Answer

1.6 km. Closing speed = 4 + 2 = 6 km/h, so they meet after 0.4 h. The swimmer from the upstream end moves at 4 km/h: 4 × 0.4 = 1.6 km.

Two swimmers start at the same moment from the two ends of a 2.4 km stretch of river and swim towards each other. Each swims at 3 km/h in still water and the current is 1 km/h. How far from the upstream end do they meet?

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