A spherical iron ball of rdius 10cm is coated with a layer of ice of uniform
thickness that melts at a rate of . When the thickness of
the ice is 5 cm , then the rate at which the thickness ( in cm / min ) of the ice
decreases, is :
Volume of ice ,
at x = 5,
So, option (1) is correct.
Option 1)
Option 2)
Option 3)
Option 4)
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