## anonymous 4 years ago Pictured here is a grain silo on a farm. If it can be filled to the very top with corn, about how much corn can this silo hold? twenty-seven thousand, two hundred thirteen cubic feet of corn twenty-five thousand, one hundred twenty cubic feet of corn thirty-one thousand, four hundred cubic feet of corn twenty-three thousand five hundred fifty cubic feet of corn

1. anonymous

2. anonymous

you have to click the zoom button to see the picture

3. blockcolder

So the silo is composed of two parts: a cylinder and a cone. Find the volume of each, then add.

4. anonymous

but how do you find the volume of the cone?

5. blockcolder

$$\Large V_{\text{cone}}=\frac{1}{3}Bh$$ where B is the area of the base and h is the height from the apex to the base.

6. anonymous

how do I find the base?

7. blockcolder

The base of the cone in this case is a circle with diameter 20.

8. anonymous

oh, ok I thought you had to do something else

9. anonymous

$1/3_{20}\times20$ so is that how you find the answer? to the cone?

10. anonymous

I am not getting the right answers... could you work the problem out?

11. blockcolder

I think you meant this: $\frac{1}{3}(10)^2(20)\pi=\frac{2000}{3}\pi$ because the radius of the circle is 10. The V of the cylinder is $$\large (10)^2\pi(80)=8000\pi$$ Add them up and you get $$\Large \frac{26000}{3}\pi$$ or if you need a decimal, plug this in your calculator.

12. anonymous

that isn't any of the answers... :( I am going to cry, why can't i figure this stupid question out!

13. anonymous

14. blockcolder

The closest answer is the 27213, so I'd just take that answer.

15. anonymous

okkkk.... :'( sniff sniiffff