The road is a rectangle 12 feet wide and 1 mile long. To answer the question you need calculate the area and multiply by the depth to finish with the cubic capacity.
The main problem with the task is the calculation must be made in the same unit whether inches, feet or miles. The most convenient unit would be feet but if accuracy is required using a multiplier of one-third of a foot (4") which is 0.333 recurring represents a small loss of accuracy.
The alternative would be to use inches as the units or preferably to remain with feet but instead of multiplying by the depth as a decimal fraction turn it into a vulgar fraction and multiply by that.
Length x width x 4/12 = cubic feet
There is a further consideration which is such things as concrete and other similar materials is not bought and sold per cubic foot but by cubic yard so either the unit chosen really must be yards or the answer in cubic feet must be converted into cubic yards.
The equation then becomes either:
length x width x 4/12 = cubic feet/27 (all units in feet) OR
length x width x 4/36 = cubic yards (all units in yards)
Open a calculator and multiply 5280x12x..33
310 views
Usually answered in minutes!
×