Two swimmers start from point p on one bank of the river to reach q on the opposite bank. Velocity of each swimmer in still waters is
2.5 km h–1. One of the swimmers crosses the river along the straight route pq and the other swims right angles to the stream and then walks the distance which he has been carried away by the river to get to point q. Stream velocity is 2 kmh–1. If both the swimmers reach point q simultaneously, the velocity of walking off second swimmer is
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Answer:
2.5 × 2 - 2
= 5 - 2
= 3 km.
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