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WAEC Mathematics 2020 Paper

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Question : 26

Total: 48

The dimension of a rectangular base of a right pyramid is 9 cm by 5cm. If the volume of the pyramid is 105 cm

^3

, how high is the pyramid?

10cm
6cm
8cm
7cm

Solution:

Volume = $\;\frac{1}{3}$ x 9 x 5 x h

105 = $\;\frac{1}{3}$ x 9 x 5 x h

$\;\frac{105}{15} = \;\frac{15h}{15}$

h = 7cm

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