Michigan Residential Builders License Practice Test

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What is the formula for estimating concrete volume in cubic yards?

(L × W × T) / 27
(L × W) / 27
(L + W + T) / 3
L × W × T

The correct answer is: (L × W × T) / 27

The correct formula for estimating concrete volume in cubic yards is derived from the basic principle of calculating the volume of a rectangular prism. The volume in cubic feet can be calculated by multiplying the length, width, and thickness of the slab (L × W × T). This product gives the volume in cubic feet, and since there are 27 cubic feet in one cubic yard, you must divide the total cubic feet by 27 to convert it into cubic yards. Therefore, the formula (L × W × T) / 27 correctly provides the estimated volume of concrete needed for a project in cubic yards. Other options, while they may incorporate some of the dimensions, do not accurately represent the volume calculation necessary for this purpose. The formula excludes critical calculations or uses incorrect conversions, which would lead to an inaccurate estimation of concrete volume.