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# A boat moving upstream with velocity 3 w.r.t. ground. An observer standing on boat observes that swimmer 'S' is crossing the river perpendicular to the direction of motion of boat. If river velocity is 4m/s & swimmer crosses the river width 100 m in 50 sec then -

- Velocity of swimmer w.r.t. ground is
- Velocity of swimmer w.r.t. ground is
- Drift of swimmer along river is zero
- Drift of swimmer along river will be 50 m

## The correct answer is: Velocity of swimmer w.r.t. ground is

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