GabbieB1999 GabbieB1999

28-11-2018
Mathematics

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The length of a rectangle is twice it’s width. If the area of the rectangle is 72ft ^2, find it’s perimeter

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Mareska95 Mareska95

28-11-2018

Hi!

length = l = 2 * width = 2 * w

Area = l * w = l * 2 * l = 2 * l^2

2 * l^2 = 72

l^2 = 72/2 = 36

l = square root of 36

l = 6

l = 2 * w => w = l/2 = 6/2 = 3

Perimeter = 2 * l + 2 * w = 2 * 6 + 2 * 3 = 12 + 6 = 18 feet

Hope this helps!

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