The area of a rectangle is 18\,{cm}². If the width is 2 cm , find its perimeter.

Correct Answer is : 22 cm22\,{cm}22cm

Correct Answer is : 22 cm22\,{cm}22cm

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BECE Mathematics 2024 Paper

Question : 22

Total: 40

18\,\mathrm{cm}^2

Solution:

Concept:

The perimeter of a rectangle is the total distance around it, found using its length and width.

Explanation:

Given: Area

= 18\,\mathrm{cm}^2

and width

= 2\,\mathrm{cm}

For a rectangle, Area

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

Let the length be

l

. So,

l \times 2 = 18

Divide both sides by

2

l = 9\,\mathrm{cm}

Perimeter of a rectangle

= 2 \times (\text{length} + \text{width})

Perimeter

= 2 \times (9 + 2) = 2 \times 11

Perimeter

= 22\,\mathrm{cm}

Answer:

22\,\mathrm{cm}

(Option D).

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