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JAMB Mathematics 2013 Paper

Question : 38

Total: 47

Solution:

Concept:

Divide the total floor area by the area of one square tile after converting all units to metres.

Explanation:

Side of one square tile

= 30\text{ cm} = 0.3\text{ m}

Area of one tile

= 0.3 \times 0.3 = 0.09\text{ m}^2

Area of the rectangular floor

= 7.2 \times 4.2 = 30.24\text{ m}^2

Number of tiles required

= \dfrac{30.24}{0.09}

This simplifies to

336

tiles.

Answer:

336

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