What is the volume of a solid cylinder of diameter 7cm and height 7cm? (Take \(\pi = \frac{22}{7}\))

  • A 38.5cm3
  • B 77cm3
  • C 269.5cm3
  • D 1078cm3
waec 2004mathematics

The correct answer is C. 269.5cm3

Volume of a solid cylinder = Base area x height

Base area \(=\pi r^2 =\frac{22}{7} \times \frac{7}{2}\times \frac{7}{2} = \frac{77}{2}\)

Volume of a solid cylinder = \(\frac{77}{2}\times \frac{7}{1} = \frac{539}{2}cm^3\\

=269.5cm^3\)

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