The volume of a pyramid with height 15cm is 90cm 3 . If its base
MATHEMATICS
WAEC 2016
The volume of a pyramid with height 15cm is 90cm3. If its base is a rectangle with dimension xcm by 6cm, find the value of x
- A. 3
- B. 5
- C. 6
- D. 8
Correct Answer: A. 3
Explanation
Volume of pyramid = \(\frac{1}{3}\)lbh
90 = \(\frac{1}{3} \times x \times 6 \times 15\)
x = \(\frac{90 \times 33}{6 \times 15}\)
= 3
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