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24jgrove
21.08.2019 •
Mathematics
The length of a rectangular field is 4 m longer than its width.
if the perimeter is 56 m, what is the width of the field?
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Ответ:
Let's call the width x. If the length is 4m longer, then it's x+4.
We know the perimeter, so we can make an equation:
56=2x+2(x+4)
And solve from there:
56=2x+2x+8
56=4x+8
48=4x
48/4=x
x=12
The width, which is x, is 12 m. And the length, x+4, is 16 m.
You can check this is correct by calculating the perimeter using those values: 12+12+16+16=56.
Ответ: