MathematicsDifferentiationJAMB
The area of a circle is A = πr². Find the rate of change of A with respect to r when r = 7. (Take π = 22/7.)
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Answer: A. 44
dA/dr = 2πr = 2 × 22/7 × 7 = 44.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.