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in Physics by (74.3k points)

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 

1 Answer

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by (69.0k points)
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Best answer

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. 

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