A rectangular lot must enclose an area of

MATHEMATICS · Single correct · A Level · Mathematics · Differentiation · Differentiation

Problem

2000\text{ m}^2

. To minimize the amount of fencing required, what should be the length of each side of the lot, to the nearest tenth of a meter? (a)

62.5\text{ m}

(b)

44.7\text{ m}

(c)

31.6\text{ m}

(d)

50.0\text{ m}