Question

a boy wants to cross the river in a such a way so that he could reach exactly at the opposite point B from where he started the angle that we should make from the line ab​

Answer 1

Answer:

angle (x°) = sin^-1 (velocity of the river/velocity of boy in still water)

Explanation:

Drift =0

so, sin x° = (velocity of the river/velocity of boy in still water)

x ° =sin^-1 ( velocity of the river /velocity of boy in still water)