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Find the rate of change of the area of a...

Find the rate of change of the area of a circle with respect to its radius 'r' when r = 2 cm.

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The correct Answer is:
`10pi"cm"^(2)//sec`
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BETTER CHOICE PUBLICATION-APPLICATIONS OF DERIVATIVES-ASSIGNMENT (SHORT ANSWER TYPE QUESTIONS) (SECTION II)
  1. Find the rate of change of the area of a circle with respect to its ra...

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  2. The radius of a circle is increasing uniformly at the rate of 7cm/sec....

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  3. The radius of a circle is increasing uniformly at the rate of 11 cm pe...

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  4. The radius of a balloon is increasing at the rate of 10 cm/sec. At wha...

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  5. The volume of a balloon is changing at the rate of 25 "cm"^(3)//sec. F...

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  6. A balloon, which always remains spherical has a variable radius. Find ...

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  7. The volume of a cube is increasing at the rate of 9 "cm"^(3)//sec. How...

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  8. The radius of a spherical spherical bubble is increasing at the rate o...

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  9. The radius of a spherical soap bubble is increasing at the rate of 0.3...

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  10. The radius of a spherical soap bubble is increasing at the rate of 0.2...

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  11. The radius of a spherical soap bubble is increasing at the rate of 0.2...

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  12. The radius of a spherical soap bubble is increasing at the rate of 0.4...

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  13. The radius of a spherical soap bubble is increasing at the rate of 0.4...

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  14. A particle moves along the curve 6y = x^3+2. Find the points on the cu...

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  15. A particle moves along the curve y=4/(3)x^(3)+5. Find the points on th...

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  16. A particle moves along the curve x^(2)=2y. At what point the y-coordin...

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  17. A man 160 cm tall, walks away from a source of light situated at the t...

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  18. Sand is pouring from a pipe at the rate of 9 "cm"^(3)//s. The falling ...

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  19. A man is walking at the rate of 6.5km/h towards the foot of a tower 12...

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  20. A ladder 16 m long is leaning against a wall. The bottom of the ladder...

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