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Area A of a blot of increasing in such ...

Area A of a blot of increasing in such a way that, after t second , `A=3t+t^(3)`. Rate at which the blot is expanding after 2 seconds is

A

6 sq. u. /sec

B

15 sq.u./sec.

C

9sq. u/sec

D

18 sq . u /sec

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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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