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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
(a) r=3 cm `" "` (b) r=4 cm

Text Solution

Verified by Experts

The correct Answer is:
`6pi cm^(2)//cm`
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Knowledge Check

  • The rate of change of the area of a circle with respect to its radius r at r = 6 cm is

    A
    `10pi`
    B
    `12pi`
    C
    `8pi`
    D
    `11pi`

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