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Area of circular blot of ink is increasi...

Area of circular blot of ink is increasing at the rate of `2cm^(2)//sec.`When the area of the blot is `4cm^(2),`its radius is increasing at the rate of

A

`(1)/(2pi) cm//sec `

B

`(1)/(2sqrtpi) cm//sec.`

C

`(1)/(2pi^(2))cm//sec.`

D

`(pi)/(sqrt2)cm//sec.`

Text Solution

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The correct Answer is:
B
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MARVEL PUBLICATION-APLICATIONS OF DERIVATIVES-MULTIPLE CHOICE QUESTIONS (TEST YOUR GRASP - II : CHAPTER 12)
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