Question

The radius of a circle is increasing at the rate of 0.7 cm/s. What is the rate of increase of its circumference?​

Answer 1

Step-by-step explanation:

$\huge\underline\bold\fcolorbox{black}{cyan}{Question}$The radius of a circle is increasing at the rate of 0.7 cm/s. What is the rate of increase of its circumference?$\huge\pink{\fbox{\bf{Answer}}}$Letr be the radius of circle

& C be the circumference of circle

Given that

Radius of a circle is increasing at the rate of 0.7 cm/sec

dr i.e. = 0.7 cm/sec dt

We need find rate of change of circumference of circle w. r. t time

dC dt i.e. we need to calculate

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