#### Problem Statement: Differential Calculus

**Maxima Minima Problem Solving**

A boatman is at A, which is 4.5 km from the nearest point B on a straight shore BM. He wishes to reach, in minimum time, a point C situated on the shore 9 km from B. How far from C should he land if he can row at the rate of 6 Kph and walk at the rate of 7.5 Kph?

A. 1 km

B. 3 km

C. 5 km

D. 8 km

#### Problem Answer:

The boatman should land **3 km** from C if he can row at the rate of 6 Kph and walk at the rate of 7.5 Kph.

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