Question

The perimeter of rectangular piece of paper is 56 cm. If the length is three times its width, what is its width?

• A. 8 cm
• B. 56 cm
• C. 7 cm
• D. 21 cm

Answer 1

The correct option is C 7 cm

Given: Perimeter of rectangular piece of paper = 56 cm
Length = 3 $\times$ Width
Let the width be $x$ cm.
$\Rightarrow$ Length $=3x$ cm
$\therefore$ Perimeter =2(length + width) $=2(3x+x)=8x$ cm
$\Rightarrow 8x=56\Rightarrow x=7$
$\therefore$ Width is 7 cm.