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Let the lenght be 4x and the width be x:

Perimeter = 2(4x+x) = 90 cm

8x+2x = 90

10x = 90

x = 9

Therefore: length = 36 cm and width = 9 cm

Check: 36+36+9+9 = 90 cm

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What is the perimeter of a rectangle if the length is 30m and the width is 20m?

The perimeter of a rectangle is calculated using the formula ( P = 2 \times (length + width) ). For a rectangle with a length of 30 meters and a width of 20 meters, the perimeter would be ( P = 2 \times (30 + 20) = 2 \times 50 = 100 ) meters. Thus, the perimeter of the rectangle is 100 meters.


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How does tripling the side lengths of a rectangle affect its perimeter?

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Related Questions

Perimeter of a rectangle?

2 times (length + width)


What is the perimeter of a rectangle if the length is 30m and the width is 20m?

The perimeter of a rectangle is calculated using the formula ( P = 2 \times (length + width) ). For a rectangle with a length of 30 meters and a width of 20 meters, the perimeter would be ( P = 2 \times (30 + 20) = 2 \times 50 = 100 ) meters. Thus, the perimeter of the rectangle is 100 meters.


What is the perimeter of a rectangle with length 16.8 units and width 9.6 units?

The perimeter of a rectangle is calculated using the formula ( P = 2 \times (length + width) ). For a rectangle with a length of 16.8 units and a width of 9.6 units, the perimeter is ( P = 2 \times (16.8 + 9.6) = 2 \times 26.4 = 52.8 ) units. Therefore, the perimeter of the rectangle is 52.8 units.


Area and perimeter of a rectangle?

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How does tripling the side lengths of a rectangle affect its perimeter?

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