JEE Main 2019 — Application Of Derivatives Question with Solution
From: JEE Main 2019 (Online) 10th April Evening Slot
Question
A spherical iron ball of radius 10 cm is coated with a layer of ice of uniform thickness that melts at a rate of
50 cm3
/min. When the thickness of the ice is 5 cm, then the rate at which the thickness (in cm/min) of the ice
decreases, is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
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This is a previous-year question from JEE Main 2019, 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.