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7. The length of the rectangle is 25 metres and the width is 4

metres. Find its area.
8. The width of the school farm is 20 metres. If its length is 41

metres, find its area.
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9. The length of a rectangle is 215 metres and its width is 92
metres. Find its area in centimetres.

10. The length of a rectangular garden is 84 metres. If its width
is 45 metres, find its area.

Area of a square

The area of a square is the entire surface region of the square.
The area of a square is obtained by multiplying the length by the
width of the square. Recall that all sides of a square have equal

length.

Thus, Area of a square = length × width or length × length.

Example 1

Find the area of the following square.

9 cm

9 cm

Solution

Length of a side = 9 cm

Area of the square = 9 cm × 9 cm

2
= 81 cm .
2
Therefore, the area of the square is 81 cm .

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06/11/2024 17:17:23
MATHEMATICS STD 4 PB 2024.indd 98
MATHEMATICS STD 4 PB 2024.indd 98 06/11/2024 17:17:23