Let's assume that the length of the scrapbook is "L" cm.
The perimeter of a rectangle is given by the formula:
Perimeter = 2(L + W)
where L is the length and W is the width.
We are given that the width of the scrapbook is 40 cm and the perimeter is 140 cm.
Substituting these values in the formula, we get:
140 = 2(L + 40)
Simplifying the equation, we get:
L + 40 = 70
L = 70 - 40
L = 30
Therefore, the length of the scrapbook is 30 cm.
To find the area of the scrapbook, we can use the formula:
Area = Length x Width
Substituting the values, we get:
Area = 30 x 40
Area = 1200 cm²
Therefore, the area of the scrapbook is 1200 cm².
Louise measured the perimeter of her rectangular scrapbook to be 140 cm. If the scrapbook is 40 cm wide, how long is the scrapbooK
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1 answer