Question

use the formula P=2l+2w to find the length l of a rectangular lot if the width w is 45 feet and the perimeter P is 240 feet

Answer 1

240=2l+2(45) solve for l 
240=2l+90   240-90=150/2=75

Answer 2

The length of the rectangle is 75 feet.

What is rectangle?

"It is a quadrilateral whose all angles measure 90° and opposite sides are parallel and equal in length."

What is the perimeter of the rectangle?

"It is the sum of all the sides of the rectangle."

For given question,

We have been given the width w is 45 feet and the perimeter P is 240 feet.

We need to find the length (l) of the rectangle.

Using the formula for the perimeter of the rectangle,

⇒ P = 2l + 2w

⇒ 240 = 2l + 2(45)

⇒ 240 - 90 = 2l

⇒ 2l = 150

⇒ l = 75 feet

Therefore, the length of the rectangle is 75 feet.

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