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River is flowing from west to east with a speed 5 m/s.Swimmer can swim in still water with speed 10 m/s.If he wants to start from point A on south bank and reach opposite point B on north bank In what direction should he swim? Options are : a) 30°east of north b) 30°west of north c)60°east of north d)60° west of north

River is flowing from west to east with a speed 5 m/s.Swimmer can swim in still water with speed 10 m/s.If he wants to start from point A on south bank and reach opposite point B on north bank In what direction should he swim? Options are : a) 30°east of north b) 30°west of north c)60°east of north d)60° west of north

Grade:12th pass

2 Answers

Riddhish Bhalodia
askIITians Faculty 434 Points
8 years ago
Solution in the figure
See the direction and the theta and pick the correct option according to that
512-494_Photo on 04-03-16 at 3.55 PM.jpg
JAHNAVI
15 Points
8 years ago
Vsw = Vs + Vw = 10 + 5i, Q1. 

Tan A = Vw/Vs = 5/10 = 0.500 
A = 26.6o E. of N. 

Direction = 26.6o W. of N.

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