Question
The rate of change of the area of a circle with respect to its radius r at r = 6 cm is
(A) 10π
(B) 12π
(C) 8π
(D) 11π
Solution
The area of a circle (A) with radius (r) is given by,
Hence, the required rate of change of the area of a circle is 12π cm2/s.
The correct answer is B.
Is there an error in this question or solution?
Solution The Rate of Change of the Area of a Circle with Respect to Its Radius R At R = 6 Cm is Concept: Rate of Change of Bodies Or Quantities.
