Physics-
General
Easy

Question

A boat moving upstream with velocity 3 m divided by sw.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 -

  1. Velocity of swimmer w.r.t. ground is square root of 13 m divided by s    
  2. Velocity of swimmer w.r.t. ground is 2 m divided by s    
  3. Drift of swimmer along river is zero    
  4. Drift of swimmer along river will be 50 m    

The correct answer is: Velocity of swimmer w.r.t. ground is 2 m divided by s

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