# Math Ratios

The ratio of the length of a parallelogram to that of its breadth is 7:4. The length is longer than the breadth by 746.1 cm. Find the perimeter of the parallelogram

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1. l/b = 7/4
l = b+746.1

so, since l = 7/4 b,

7/4 b = b+746.1
3/4 b = 746.1
b = 994.8
so, l = 1740.9

check: 1740.9/994.8 = 1.75 = 7/4

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2. l:b = 7:4
l/b=7/4
4l=7b

but l = b+746.1
4(b+746.1) = 7b
2984.4 = 3b
b = 994.8
l = 994.8 + 746.1 = 1740.9

perimeter = 2l + 2b = .....

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3. they are right

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4. 5471.4

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