Q. 245.0( 1 Vote )
B. surface area times the rate of change of diameter
C. surface area times the rate of change of radius
D. none of these
Answer :
The volume and surface area of a sphere, with radius r, is defined as
- (1) and A(r)=4πr2
Differentiating (1) with respect to t, we get
=(Surface area of a sphere)×(rate of change of radius)
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