Math, asked by brijlal17, 7 months ago

The rate of change of the area of a circle with respect
to its radius, when r=3 cm is
1
(a) 2 cm²/cm (b) 31 cm²/cm
(c) 61 cm²/cm (d) 121 cm"/cm​

Answers

Answered by lakshya200627
1

Answer:

Area (A) of circle having radius (r) id given by,

A=πr

2

Differentiate above w.r.t. r

dr

dA

=2πr

Hence rate of change of area when radius r=2 cm is

=

dr

dA

r=2

=2π(2)2=4π cm

Step-by-step explanation:

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