A girl standing at point P on a beach wishes to reach a point Q in the sea as quickly as possible. She can run at 6 km h–1 on the beach and swim at 4 km h–1 in the sea. She should take the path
(A) PAQ
(B) PBQ
(C) PCQ
(D) PDQ
Correct option (C) PCQ
Explanation:
In beach velocity is higher
∴ beach is rarer and sea is denser medium
So when it go from rarer to denser medium it bend toward normal to reach in minimum time.
