Posted by **Mike** on Wednesday, May 14, 2008 at 8:27pm.

How many cubic yards of concrete will it take to fill a cylindrical column that is 16 feet high and whose diameter is 4 feet?

Use pi=3.14

(round your answer to the nearest TENTH)

If a cubic yard of concrete costs $75, using the rounded answer from above, what would be the cost for the concrete (rounded to the nearest dollar)

- Math -
**drwls**, Wednesday, May 14, 2008 at 8:44pm
The volume is pi D^2/4 * H

In cubic ft, this is

(3.14)*(1/4)*(4)^2*(16)= 201.0 ft^3. Divide by 27 ft^3/yard^3 for the number of cubic yards.

Then multipy by $75/yard^3 for the cost.

- Math -
**Mike**, Wednesday, May 14, 2008 at 8:50pm
would it be 7.4 cubic yards

and 558 dollars

- Math -
**drwls**, Thursday, May 15, 2008 at 2:07am
Yes.

## Answer this Question

## Related Questions

- math - How many cubic yards of concrete will it take to fill a cylindrical ...
- math - concrete can be purchased cubic yard. How much will it cost to pour a ...
- Math - If a pool deck of 650 square feet is to be laid with concrete 3" thick, ...
- Math - Using the formula for the surface area of a SPHERE: Use Pi = 3.14 If the ...
- Math-Urgent - A circus performer is juggling clubs while standing on stilts. He ...
- math - . Find the volume of the sphere with a radius of 9. Use ð = 3.14 and ...
- Science - *Cement is 70% CaO by mass *Concrete is 17% cement by mass *Concrete ...
- math - a water tank measures 12o feet in diameter and is 50 feet high .how many ...
- math - A 4inch-thick concrete slab is being poured for a circular patio 14 feet ...
- math - 1. Find the area of a circle whose diameter is 5.1 centimeters (cm). Use ...

More Related Questions