JEE MATHEMATICS MCQ: DIFFERENTIATION

1 Easy

1 of 1

Application +4 | -1

The length

l

of a rectangle is decreasing at the rate of

2 \mathrm{~cm} / \mathrm{sec}

while the widths

w

is increasing at the rate of

2 \mathrm{~cm} / \mathrm{sec}

. When

l=12

and

w=5

, the rate of change of area is (in

\mathrm{cm}^2 / \mathrm{sec}

)

View answer and explanation

Correct option: A

Option A (14) is correct because it is the rate of change of the area calculated using the product rule of differentiation.

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