Test Index

WAEC Mathematics 2013 Paper

© africaexams.com

Question : 30

Total: 48

A pyramid has a rectangular base with dimensions 12m by 8m. If its height is 14m, calculate the volume

322m³
448m³
632m²
840m²

Solution:

Concept:

A pyramid’s volume is one-third of the product of its base area and its height.

Explanation:

The base is a rectangle of length

12 \, \text{m}

and width

8 \, \text{m}

.

So, base area

= 12 \times 8 = 96 \, \text{m}^2

.

Height of the pyramid

= 14 \, \text{m}

.

Volume

= \frac{1}{3} \times \text{base area} \times \text{height}

.

Volume

= \frac{1}{3} \times 96 \times 14 = 32 \times 14 = 448 \, \text{m}^3

.

Answer:

448 \, \text{m}^3

— Option B.

© africaexams.com

Go to Question:

Prev Question

Next Question