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Stels [109]
3 years ago
10

The area of a rectangle is 3920 square meters. If the ratio of the length to the width is 5:4, find the perimeter of the rectang

le
Mathematics
1 answer:
Vlada [557]3 years ago
8 0

Answer: 252m

Step-by-step explanation:

The length of the rectangle will be 70m while the width will be 56m. To check if it's applicable to the ratio 5:4, we can divide the numbers by 14.

70 ÷ 14/56 ÷ 14 = 5/4 = 5:4

Perimeter = 2(length + width)

= 2(70 + 56)

= 2 × 126

= 252 meters

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Work Shown:

A = 1250 is the initial amount

B = 2780 is the new amount

C = percent change = unknown for now

The formula to use is

C = [ (B-A)/A ] * 100

to calculate the percent change.

Basically we calculate the change (B-A) first and then divide that over the original amount A to compute the decimal form of the answer, which is then converted over to percentage form. The "100" tacked on at the end is what converts from decimal to percent form.

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C = [ (B-A)/A ] * 100

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The positive C value indicates we have a percent increase. If C were negative, then we'd have a percent decrease.

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