A concrete sidewalk 3 feet wide, 18 feet long, and 4 inches thick contains how many cubic feet of concrete?

TO ANONYMOUS

Be careful it's 4 inches not 4 feet.

3 feet * 18 feet= 54 feet. 4 inches = 1/3 feet....

54 feet* 1/3 feet = 18 cubic feet of concrete!

(18)(3)(12)(4) = 2592 cubic inches

2592/12 = 216 cubic feet

(You can check if you want, I did it myself so just use a calculator or something)

6 feet X 160 feet x (9/12) feet / 27 cubic feet per cubic yard = 26.67 CY.

This is for all new sidewalk. Most sidewalk is not 9 inches thick. It is
usually 4 inches thick, as is most driveways. They use 9 inch thick concrete for older freeways. New freeways are 12 inches thick.

To find the volume of the concrete sidewalk, we need to multiply the width, length, and thickness of the sidewalk.

The width is given as 3 feet, the length as 18 feet, and the thickness as 4 inches. However, it is important to note that all measurements should be in the same unit before performing any calculations.

Since the thickness is given in inches, we need to convert it to feet. There are 12 inches in a foot, so 4 inches is equivalent to 4/12 = 1/3 feet.

Now we have the width as 3 feet, the length as 18 feet, and the thickness as 1/3 feet.

To find the volume, we multiply these values together:

Volume = Width × Length × Thickness
= 3 feet × 18 feet × 1/3 feet

Simplifying this:

Volume = 54 cubic feet × 1/3 feet
= 54/3 cubic feet
= 18 cubic feet

Therefore, the concrete sidewalk contains 18 cubic feet of concrete.

216 cubic feet

volume = lwh

= 18(3)(1/3)
= 18 cubic feet