The perimeter of a rectangular piece of paper is 64 cm. If the length is three times its width, find its width.

8 cm

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12 cm

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18 cm

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10 cm

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Solution

The correct option is A 8 cm
Given: Perimeter of a rectangular piece of paper = 64cm
Length = 3 $\times$ Width
Let the width be $x$ cm.
$\Rightarrow$ Length $= 3 x$ cm
$∵$ Perimeter =2(length + width) $= 2 (3 x + x) = 8 x$ cm
$\Rightarrow 8 x = 64 \Rightarrow x = 8$
$∴$ Width is 8 cm

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The perimeter of a rectangular piece of paper is 64 cm. If the length is three times its width, find its width.

The correct option is A 8 cmGiven: Perimeter of a rectangular piece of paper = 64cm Length = 3 × Width Let the width be x cm. ⇒ Length =3x cm ∵ Perimeter =2(length + width) =2 (3x + x) = 8x cm ⇒8x = 64⇒x = 8 ∴ Width is 8 cm

The correct option is A 8 cm
Given: Perimeter of a rectangular piece of paper = 64cm
Length = 3 $\times$ Width
Let the width be $x$ cm.
$\Rightarrow$ Length $= 3 x$ cm
$∵$ Perimeter =2(length + width) $= 2 (3 x + x) = 8 x$ cm
$\Rightarrow 8 x = 64 \Rightarrow x = 8$
$∴$ Width is 8 cm