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kodGreya [7K]
3 years ago
10

The length of a rectangle is twice its width. the perimeter of the rectangle is 90 cm. what are the length and width?

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
4 0
L = 2w

2w + 2(2w) = 90
2w + 4w = 90
6w = 90
w = 15

L = 2(15)
L = 30

Length is 30 and width is 15

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----------------------------------------------------------------------------------------------

Perimeter of a square = 4 × side length

If the perimeter of the square is 40 cm,
then the side length = 40 ÷ 4 = 10 cm

Area of a square = side length x side length

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⇒ area of left triangle = 1/2 x (10 - 7) x 10 = 15 cm²

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(55 ÷ 100) × 100% = 55%

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