A company that manufactures storage bins for grains made a drawing of a silo. The silo has a conical base, as shown below.
What is the total volume of grains that can be stored in the silo?
34π ft3

68π ft3

136π ft3

152π ft3

Question

A company that manufactures storage bins for grains made a drawing of a silo. The silo has a conical base, as shown below. 
What is the total volume of grains that can be stored in the silo? 
34π ft3 

 68π ft3 

 136π ft3 

 152π ft3

anonymous · Answer

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anonymous · Answer

You have to take the volume of a cylinder and add it to the volume of a cone. The volume of a cylinder is $$v=pir ^{2}h$$ and the volume of a cone is $$V=(1/3)pir ^{2}h$$

anonymous · Answer

what is pir?

anonymous · Answer

R = radius which is 2 (the diameter is 4. 4 divide by 2 is 2). pi is 3.142

anonymous · Answer

oh pi times the radius, so 2*3.14 is 6.28 so then i need to square tht?

anonymous · Answer

and times it by the height

anonymous · Answer

It would probably be easier to take the radius squared then multiply by 3.14 and then take it times the height

anonymous · Answer

so 4 times 3.14 is 12.56 and the height is 9.5, soo 12.56 * 9.5 would be 113.04

anonymous · Answer

Well I'm getting 119.32

anonymous · Answer

the answer choices are 
34π ft3 

 68π ft3 

 136π ft3 

 152π ft3

anonymous · Answer

Yes but you still need to find the volume of a cone and add the two volumes together. In this case, the answers are not multiplying by 3.14. So really for the circle's volume it would be 38pi + the volume of the cone.

anonymous · Answer

it doesnt give the volume of the cone?

anonymous · Answer

volume of cone = 1/3 * pi * r squared * height

anonymous · Answer

i have to go thank you for trying to help though i will give you a medal