Question

A formula for finding P, the perimeter of a rectangle, is P = 2l + 2w, where l is the length of the rectangle, and w is its width.

What is P when l = 10 centimeters and w = 5 centimeters?

Answer 1

Perimeter is 30

Explanation:

The formula is

P=2(l+w)

Answer 2

P is 30cm

Explanation:

Let's transform it into an expression:

P = 2w + l2

P = (5×2) + (10×2)

P = 10 + 20 = 30 cm