Question

7. A person rows a boat across a river making an angle of 60° with the downstream. The per
have saved, if he had crossed the river in the shortest possible time is
(A) 13.4 %
(C) 12.5%
(B) 15.5%
(D) 20.5%​

Answer 1

Explanation:

(c) 15.5

is right answer