How do you find the width of a rectangle with a perimeter of 90 cm and a length of 15 cm?

by

To find the width of a rectangle, you can use the formula for the perimeter:

  • Perimeter (P) = 2 * (Length (L) + Width (W))

In this scenario, we know the perimeter (P) is 90 cm and the length (L) is 15 cm. We can substitute these values into the formula:

90 cm = 2 * (15 cm + W)

Now, let’s simplify the equation step by step:

  1. First, divide both sides of the equation by 2:
  2. 45 cm = 15 cm + W
  3. Next, subtract 15 cm from both sides to solve for the width (W):
  4. 45 cm – 15 cm = W
  5. W = 30 cm

Therefore, the width of the rectangle is 30 cm.

Leave a Comment