Reading Time: < 1 minute
Last Updated on May 4, 2023
GMAT OFFICIAL GUIDE PS
Solution:
We set up the dimensions of the rectangular window as w = width and l = length.
We are given that the rectangular window is twice as long as it is wide. Thus we can say:
l = 2w
We also know that the perimeter is 10 feet, so we can say:
2l + 2w = 10
We can now substitute in 2w for l and we have:
2 x 2w + 2w = 10
4w + 2w = 10
6w = 10
w = 10/6 = 5/3
Because we know that the length is twice the width, we know that the length is:
2 x 5/3 = 10/3
Answer: B
