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frez [133]
3 years ago
15

The length of a rectangle is three times it's width. If the area of the rectangle is 147 metes squared, find its perimeter.

Mathematics
1 answer:
agasfer [191]3 years ago
6 0
l=3w\\
lw=147\\\\
3w\cdot w=147\\
3w^2=147\\
w^2=49\\
w=7\\\\
l=3\cdot7=21\\\\
p=2l+2w\\
p=2\cdot21+2\cdot7\\
p=42+14\\
p=56

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