A stone is dropped into a quiet lake and...

A stone is dropped into a quiet lake and waves move in circles at a speed of 4cm/sec. At the instant when the radius of the circula wave is 10cm, how fast is the enclosed area increaseing?

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A stone is dropped into a quiet lake and waves moves in circles at a speed of 4 cm/sec. At the instant when the radius of the circular wave is 10 cm, how fast is the enclosed area increasing?

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NCERT BANGLISH-APPLICATION OF DERIVATIVES-EXERCISE 6.6

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