If the circumference of the circle is changing at the rate of 5 cm/s t – McqOptions

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1.	If the circumference of the circle is changing at the rate of 5 cm/s then what will be rate of change of area of the circle if the radius is 6cm.
A.	20 cm<sup>2</sup>/s
B.	40 cm<sup>2</sup>/s
C.	70 cm<sup>2</sup>/s
D.	30 cm<sup>2</sup>/s
Answer» E.

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