Mathematics · Application of Derivatives
The radius of a circular wave increases at a speed of 3 cm/sec. When the radius of the circular wave is 20 cm, what is the rate at which the enclosed area increases?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1100π cm2/sec
- 2120π cm2/sec✓
- 380π cm2/sec
- 440π cm2/sec
Correct answer
120π cm2/sec
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