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Find the area of the figure above [π = 22/7]

Mathematics
JAMB 2008

Find the area of the figure above
[π = 22/7]

  • A. 12.5 cm2
  • B. 75.0 cm2
  • C. 78.5 cm2
  • D. 84.8 cm2
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Correct Answer: Option D
Explanation

Area of the figure = Area of rect + area of semi circle
\(=L \times h + \frac{1}{2}\pi r^2\\
5 \times 15 + \frac{1}{2} \times \frac{22}{7} \times \left(\frac{5}{2}\right)^2\\
=75+\frac{(22\times 25)}{2\times7}\\
=75 + 9\frac{23}{28}\\
=84.8cm\)

There is an explanation video available below.


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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts