Question

Jana is decorating 6 picture frames by gluing straws around the borders and adding wooden stars at the corners. Each picture frame measures 20 centimeters by 120 millimeters. How many straws does she need if she uses all of each straw? Each straw is 80 millimeters long. A. 21 straws B. 24 straws C. 48 straws D. 50 straws

Answer 1

C: 48 straws

Explanation:

First, find the perimeter of one picture frame: (2 x length) + (2 x width). Convert 20 centimeters to millimeters so that you are working in the same units; there are 10 millimeters in 1 centimeter, so 20 centimeters = 200 millimeters.

(2 x 200) + (2 x 120) = 400 + 240 = 640

Each picture frame has a perimeter of 640 millimeters.

Next, figure out how many straws are needed for one picture frame:

640/80 = 8

Jana uses 8 straws for each picture frame. Since she is decorating 6 picture frames, solve 6 x 8 = 48.

Jana needs 48 straws to complete her project.