CircleHard
Question
A spherical iron ball 10 cm in radius is coated with a layer of ice of uniform thickness than melts at a rate of 50 cm3/min. When the thickness of ice is 5 cm, then the rate at which the thickness of ice decreases, is
Options
A.
cm/min
cm/minB.
cm/min
cm/minC.
cm/min
cm/minD.
cm/min
cm/min
= 50
= 50 
where r = 15 
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