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Area to cover = 10*12 = 120 square units
Area of each piece of plywood = 4*8 = 32 square units
Thus if the "units" in question are the same (eg all are meters), the "square units" will be too, so divide one into the other:-
120/32 = 3.75
So you will need 3 and 3/4 sheets of plywood (so you need to purchase 4 sheets).
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How many 4' by 8' sheets of plywood are required to cover a shed roof measuring 10' by 12'?
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How much plywood needed to cover 13 feet wide by 23 feet long?
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