A farmer has 120 meters of fencing to enclose a rectangular field that borders a…
MATHEMATICS · Single correct · CBSE · Mathematics · Applications of Derivatives · Applications of Derivatives
Problem
A farmer has 120 meters of fencing to enclose a rectangular field that borders a straight river; no fence is needed along the river. If the two equal sides perpendicular to the river are each w meters long, which value of w produces the largest possible area of the field?
(a) 60 m
(b) 30 m
(c) 40 m
(d) 20 m