differentiation

Question: If by dropping a stone in a quiet lake a wave moves in circle at a speed of 3.5 cm/sec, then the rate of increase of the enclosed circular region when the radius of the circular wave is 10 cm, is $\left( \pi =\frac{22}{7} \right)$



1) 220 sq. cm/sec
2) 110 sq. cm/sec
3) 35 sq. cm/sec
4) 350 sq. cm/sec
Solution: Explanation: No Explanation
Application of Derivatives

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