1.

A stone is dropped into a quiet lake and waves move in circles at the speed of 5 cm/s . At the instant when the radius of the circular wave is 8 cm, how fast is the enclosed area increasing?

Answer»

A stone is dropped into a quiet lake and waves move in circles at the speed of 5 cm/s . At the instant when the radius of the circular wave is 8 cm, how fast is the enclosed area increasing?



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