A boatman is at A which is 4.5 km from th nearest point B on a straight shore BM. H wishes to reach in minimum tíme a point situated on the shore 9 km from B. How from C should he land if he can row at the rate of 6 kph and can walk at the rate of 7.5 kph? A. 4.15 km B. 3.0 km C. 3.25 km D. 4.0 km

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