A rectangular field is to be fenced on three sides

MATHEMATICS · Single correct · AP · Calculus AB · Analytical Applications of Differentiation · Analytical Applications of Differentiation

Problem

A rectangular field is to be fenced on three sides, with the side along a straight river left unfenced. If 120 meters of fencing are available and the side parallel to the river has length

x

meters, which value of

x

maximizes the area of the field? (a)

30

(b)

60

(c)

40

(d)

50

Related theory

Optimization
Maxima and minima

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