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BECE Mathematics 2010 Paper

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Question : 28

Total: 40

A rectangular box has length 20 cm, width 6 cm and height 4 cm. Find how many cubes of size 2 cm that will fit into the box.

120
60
30
15

Solution:

Concept:

Number of cubes that fit is found by dividing the volume of the box by the volume of one cube.

Explanation:

Volume of the rectangular box

= \text{length} \times \text{width} \times \text{height}

= 20 \times 6 \times 4

= 480\ \text{cm}^3

Volume of one cube of side

2\ \text{cm}

= 2 \times 2 \times 2

= 8\ \text{cm}^3

Number of cubes

= \dfrac{480}{8}

= 60

Answer:

B. 60

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