Question

geometry... how do i solve this?

Answer 1

?

Answer 2

Do you know how to find the volume of a cylinder?

Answer 3

no

Answer 4

volume of cylinder is pi * R^2 * h
the cylinder is 1/3 of that volume

Answer 5

since this is a right triangle, use pathagriums therom (? spelling) to find the height.

Answer 6

so its 3.14x15^2x25?

Answer 7

oh, how do i find the height?

Answer 8

\[a ^{2}+b ^{2}=c ^{2}\]

Answer 9

15^2 + x^2=25^2

x is the height

Answer 10

x=20

Answer 11

what is R then?. do we need to find R?

Answer 12

correct...so plug it into the formula
3.141 x 15^2 x 20...and take 1/3 of that is the volume of a cone

Answer 13

i got 14134.5 and i am suppose do with 1/3?

Answer 14

well, the volume of a cone is 1/3 the volume of a cylinder. to get the answer, divide your volume by 3.

Answer 15

4711.5

Answer 16

is that right?

Answer 17

Yes, that's approximately correct. I get 4712.39. If you're only using a few digits of \(\pi\) your value will be slightly smaller than if you use more...

Answer 18

\[1500\pi\] is the exact answer.

Answer 19

thank you!