Perimetre of a rectangle from its area and width
Find the missing side from the area, then find the perimetre.
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A rectangle has an area of 130 cm² and a width of 10 cm. What is its perimeter in cm?
Answer: 46
A rectangle has an area of 150 cm² and a width of 15 cm. What is its perimeter in cm?
Answer: 50
A rectangle has an area of 91 cm² and a width of 7 cm. What is its perimeter in cm?
Answer: 40
Tip: Find the missing side from the area, then find the perimetre.
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