Question 277969: How many rectangular pieces of wood of size 20 cm by 45 cm can be cut from a plywood sheet of 120 cm by 240 cm?
A 29 B 30 C 31 D 32 E 33
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! 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.
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