JEE Math Practice Question
A spherical iron ball $$10$$ cm in radius is coated with a layer of ice of uniform thickness that melts at a rate of $$50$$ cm$$^3$$ /min. When the thickness of ice is $$5$$ cm, then the rate at which the thickness of ice decreases is
- A.$${1 \over {36\pi }}$$ cm/min
- B.$${1 \over {18\pi }}$$ cm/min
- C.$${1 \over {54\pi }}$$ cm/min
- D.$${5 \over {6\pi }}$$ cm/min
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