Question

The width of the desk is 7 in. The perimeter of the desk is 63 in. What is

the length of the desk?

Answer 1

Perimeter of a Rectangle

The formula to find the perimeter of a rectangle is as follows:

`P=2l+2w`

• 
  `l` = length
• 
  `w` = width

Solving the Question

We're given:

• 
  `w` = 7 inches
• 
  `P` = 63 inches
• We are solving for
  `l`

⇒ Plug the given information into the perimeter formula and solve for l:

`P=2l+2w\\63=2l+2(7)\\63=2l+14\\49=2l\\l=24.5`

Answer

Therefore, the length of the desk is 24.5 inches.