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(i) The radius of a circle is increasing...

(i) The radius of a circle is increasing at the rate of 5 cm/sec. Find the rate of increasing of its perimeter.
(ii) If the area of a circle increases at a constant rate, then show that the rate of increase of its circumference is inversely proportional to its radius.

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The correct Answer is:
`10 pi cm//sec`
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NAGEEN PRAKASHAN ENGLISH-APPLICATIONS OF DERIVATIVES-Exercise 6a
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  2. (i) The radius of a circle is increasing at the rate of 5 cm/sec. Fin...

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  3. The side of a square is increasing at a rate of 3 cm/sec. Find the rat...

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  4. The side of a square is increasing at a rate of 4cm/sec. Find the rate...

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  5. The rate of increase of the radius of an air bubble is 0.5 cm/sec. Fin...

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