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JEE MATHEMATICS MCQ: RATE MEASURE

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Side of an equilateral triangle expands at the rate of

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

. The rate of increase of its area when each side is

10 \mathrm{~cm}

is

View answer and explanation

Correct option: B

10 \sqrt{3} \mathrm{~cm}^2 / \mathrm{sec}

Option B (

10 \sqrt{3} \mathrm{~cm}^2 / \mathrm{sec}

) is correct because it is the rate of increase of the area of the equilateral triangle, calculated using related rates.

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