CSLB Concrete C8 License Practice Test #1 2023 exam questions and answers
Contractors State License Board(CSLB) CSLB Concrete C8 License Practice Test #1 2023 exam questions and answers What is the volume of a cylinder if the diameter equals 3 feet and the length equals to 12 feet? - answer 84.78 cubic feet Explanation: There are two ways to solve the problem. However, regardless of which method is used, you need to first determine the area of the circle then multiply it by the length.Traditional MethodUse the following formula:Area of the circle = π x r x rWhere π = 3.14 and radius (r) = 1.5 feet (half of the diameter length)Area = 3.14 x 1.5 x 1.5Area = 7.065 sq. ft.Multiply area by the length to find the volume.7.065 x 12 = 84.78Shortcut MethodArea of the circle is 78.5% of the square. Treat the circle as a square and solve for the area.Find the area of the square instead of the circle.3' x 3' = 9 sq. ft.Since circle is 78.5% of the square, multiply area of the square by 78.5% (or .785 if there is no percentage sign on the calculator).9 sq. ft. x .785 = 7.065 square feetMultiply area by the length to find the volume.7.065 x 12 = 84.78 cubic feet
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