Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Differential Calculus Applications of Derivatives
The rate at which the radius of a sphere changes over time is \(\frac{1}{2\pi}\). When the radius is 5 cm, then the rate of change of the lightning surface area of the sphere will be:
1
5 cm2/sec
2
20 cm2/sec
3
15 cm2/sec
4
More than one of the above
5
None of the above