What is the volume of a solid cylinder of diameter 7cm and height 7cm? (Take...
MATHEMATICS
WAEC 2004
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
Correct Answer: C. 269.5cm3
Explanation
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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