JEE Main 2012 — Application of Derivatives Question with Solution
JEE Main 2012 (07 May Online)
Question
If a circular iron sheet of radius is heated such that its area increases at the uniform rate of , then the rate (in ) at which the radius of the circular sheet increases is
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Let .
Thus, the rate at which the radius of the circular sheet increases is
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This is a previous-year question from JEE Main 2012, covering the Application of Derivatives chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.