differential calculus time rates

Rdl Randell Charles Malit's picture

A boatman is at which is 4.51cm from the nearest point B on A straight shore. He wishes to reach in Minimum time a point C. Situated on the shore 9km from B. How far from C should He land if He can now at the rate of 6kph and walk at the rate of 7.5kph.

fitzmerl duron's picture

I'm lazy...you can find the answer in this link:

A boatman is at which is 4.5 kilometers

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