- A man swims across a river with speed of 5 kmh (in still water), whi

1.	- A man swims across a river with speed of 5 kmh (in still water), while a boat goes upstreamwith speed 12 km h' (in still water). How fast and in which direction does the man appear to goto the boatman? Given that the speed of flowing water is 2 km hr!
Answer» The velocity of boat with respect to river => Vb = √(2)² + (12)² => Vb = √128 m/s The RELATIVE velocity of man with respect to river => VM = √(2)² + (5)² => Vm = √29 m/s The DIRECTION in which the man appear to GO to the boatman $= > theta = \cos ^{ - 1} ( \frac{vm}{vb}) \\ = > theta = \cos ^{ - 1}( \sqrt{ \frac{29}{148}) }$ The speed with which man should MOVE faster $v \: = \sqrt{148 - 29}$ V = √119 km/hr Hope it helps :)

- A man swims across a river with speed of 5 kmh (in still water), while a boat goes upstreamwith speed 12 km h' (in still water). How fast and in which direction does the man appear to goto the boatman? Given that the speed of flowing water is 2 km hr!

Answer»

The velocity of boat with respect to river

=> Vb = √(2)² + (12)²

=> Vb = √128 m/s

The RELATIVE velocity of man with respect to river

=> VM = √(2)² + (5)²

=> Vm = √29 m/s

The DIRECTION in which the man appear to GO to the boatman

$= > theta = \cos ^{ - 1} ( \frac{vm}{vb}) \\ = > theta = \cos ^{ - 1}( \sqrt{ \frac{29}{148}) }$

The speed with which man should MOVE faster

$v \: = \sqrt{148 - 29}$

V = √119 km/hr

Hope it helps :)

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- A man swims across a river with speed of 5 kmh (in still water), while a boat goes upstreamwith speed 12 km h' (in still water). How fast and in which direction does the man appear to goto the boatman? Given that the speed of flowing water is 2 km hr!​

V = √119 km/hr

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- A man swims across a river with speed of 5 kmh (in still water), while a boat goes upstreamwith speed 12 km h' (in still water). How fast and in which direction does the man appear to goto the boatman? Given that the speed of flowing water is 2 km hr!