Question

sewing a border of ribbon onto her rectangular picnic blanket. The long side of the blanket is 70cm and the short side is 40cm. How much ribbon will she need?

Answer 1

Answer:

$220$ cm

Step-by-step explanation:

We need to find the perimeter of the rectangular blanket in this case because a border is being sewn onto the blanket. The perimeter of a rectangle can be calculated by multiplying the sum of the rectangle's length and width by 2. As an algebraic expression, that would be $2(l+w)$, where $l$ is the rectangle's length and $w$ is the rectangle's width. We are given that $l=70$ and $w=40$. Therefore, $2(70+40)=2*110=220$ cm of ribbon will be needed. Hope this helps!