Question 277969
cutting lengthwise, you can get 240 / 45 = 5 boards for each width.


The number of widths = 120 / 20 = 6


total boards = 5*6 = 30.


cutting crosswise, you can get 120 / 45 = 2 boards for each width.


the number of widths = 240 / 20 = 12


total boards = 12 * 2 = 24


since 30 is one of your selections and 24 is not, go with 30.


answer is selection B.