Question

A boat`s speed in still water is 20 km/h . If the boat is to travel directly across a river whose current has a speed of 12 km/h, at what upstream angle must the boat head ?

Answer 1

Here velocity of river is wrg is 20kmph And velocity of boat in water is 12kmph. So crossing river in shortest path...sin€=velo of river / velocity of boat =20/12=5/3 As per pythagorus theorem angle = 53 degrees..

Answer 2

Answer:

126.9degree

Explanation:

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