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WAEC Mathematics 2022 Paper

Question : 25

Total: 47

Solution:

Concept:

For a rectangle, perimeter is twice the sum of length and breadth, while area is length multiplied by breadth.

Explanation:

Given length

l = 10

cm and perimeter

P = 28

cm.

Use the perimeter formula:

P = 2(l + b)

Substitute the values:

28 = 2(10 + b)

Divide both sides by 2:

14 = 10 + b

Therefore, breadth

b = 14 - 10 = 4

cm.

Now find the area:

A = l \times b = 10 \times 4

So,

A = 40\ \text{cm}^2

Answer:

40\ \text{cm}^2

(Option B).

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