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 6kmh−1 on the beach and swim at 4kmh−1 in the sea. She should take the path
1)PAQ
2)PBQ
3)PCQ
4)PDQ
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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 6kmh−1 on the beach and swim at 4kmh−1 in the sea. She should take the path
1)PAQ
2)PBQ
3)PCQ
4)PDQ
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