General Contractor Practice Exam

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How many pieces of 4 x 8 sheets of plywood are needed to form an 8ft 8 inch footing?

The correct answer is: 14

To determine the number of pieces of 4 x 8 sheets of plywood needed to form an 8ft 8 inch footing, it is essential to convert all measurements to the same unit, typically inches. The footing dimension of 8 feet 8 inches converts to: 8 feet x 12 inches/foot = 96 inches Adding 8 inches gives: 96 inches + 8 inches = 104 inches Next, we calculate the area of the footing. If the footing is needed to cover a certain area, it will help to clarify that area based on the dimensions given. The area would be determined by the specified length (104 inches) and an assumed width, say 1 foot (12 inches). Therefore, Area = Length x Width Area = 104 inches x 12 inches = 1248 square inches Each sheet of plywood measures 4 feet by 8 feet, which is: 4 feet x 12 inches/foot = 48 inches 8 feet x 12 inches/foot = 96 inches The area of each sheet of plywood is: Area of one sheet = 48 inches x 96 inches = 4608 square inches To find the number of sheets needed, you can