Question

bella uses three 24 cm by 30 cm photos to make the following rectangle. what is the perimeter of bellas rectangle?

Explanation:

Step1: Determine the length of the new rectangle

The new rectangle is formed by placing 3 photos side - by - side along the length. Each photo has a length of 24 cm. So the length of the new rectangle $l=24\times3 = 72$ cm. The width of the new rectangle $w = 30$ cm (same as the width of each photo).

Step2: Use the perimeter formula

The formula for the perimeter of a rectangle is $P = 2(l + w)$. Substitute $l = 72$ cm and $w = 30$ cm into the formula: $P=2\times(72 + 30)$. First, calculate the sum inside the parentheses: $72+30=102$ cm. Then, multiply by 2: $P = 2\times102=204$ cm.

Answer:

204