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Question 29

The radius of a circle increases at a rate of 0.5\(cms^{-1}\). Find the rate of change in the area of the circle with radius 7cm. \([\pi = \frac{22}{7}]\)

  • A.11\(cm^{2}s^{-1}\)
  • B.22\(cm^{2}s^{-1}\)
  • C.33\(cm^{2}s^{-1}\)
  • D.44\(cm^{2}s^{-1}\)
Objective

Question details

Exam body
WAEC
Subject
Further Mathematics
Year
2016
Question no.
#29
Type
Objective
Previous · Q28Find the minimum value of \(y = 3x^{2} - x - 6\). Next · Q30 Find an expression for y given that \(\frac{\mathrm d y}{\mathrm d x} =…

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