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JEE MATHEMATICS MCQ: RATE MEASURE

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Application +4 | -1

If a circular iron sheet of radius

30 \mathrm{~cm}

is heated such that its area increases at the uniform rate of

6 \pi \mathrm{cm}^2 / \mathrm{hr}

, then the rate (in

\mathrm{mm} / \mathrm{hr}

) at which the radius of the circular sheet increases is

View answer and explanation

Correct option: B

0.1

Option B (0.1) is correct because the rate at which the radius of the circular sheet increases is calculated to be 0.1 mm/hr.

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