Last Updated on May 3, 2023
GMAT OFFICIAL GUIDE PS
Solution:
The area of a rectangle is: Area = length x width
We are given that floor X is 12 feet by 18 feet and that floor Y is 9 feet wide. So we can say:
length of X = 12
width of X = 18
width of Y = 9
length of Y = n
We also can say:
Area of Floor X = Area of Floor Y
(length of X)(width of X) = (length of Y)(width of Y)
(12)(18) = 9n
(12)(2) = n
24 = n
Answer: E