Question

a classroom board is 42 inches wide and 28 inches tall. michelle is putting ribbon along the outside edge of the board. how many inches of ribbon will she need? a 98 inches b 140 inches c 70 inches d 90 inches

Explanation:

Step1: Recall perimeter formula

The perimeter of a rectangle is $P = 2(l + w)$, where $l$ is the length and $w$ is the width.

Step2: Identify length and width

Here, $l = 42$ inches and $w = 28$ inches.

Step3: Substitute values into formula

$P=2(42 + 28)=2\times70 = 140$ inches.

Answer:

B. 140 inches