Question

What is the volume of a cylindrical bucket that is 35 cm tall and has a base with a diameter of 21 cm? Use Pi = StartFraction 22 Over 7 EndFraction and round your answer to the nearest tenth of a cubic centimeter.

cm3

Answer 1

So Volume = Base * Height

Answer 2

And base = the area of the bottom

Which is also pi*r^2

Answer 3

Since the question asks you to use 22/7, the base is (22/7)*r^2

Answer 4

Oh ok so the answer is 22/7?

Answer 5

no that's pi

Answer 6

The diameter is 21, so to find r:
r=d/2

Answer 7

So what's 21/2

Answer 8

20 1/2?

Answer 9

21 divided by 2

Answer 10

ohh ok 10.5

Answer 11

Nice! So that's your radius.

We need to find the base, which is \[(\frac{ 22 }{ 7 })*(10.5)^{2}\]

Answer 12

make sure you square 10.5 first and then multiply

Answer 13

Let me know if you need help with this calculation (:

Answer 14

ok thank u soo much

Answer 15

That's just the base. After you calculate that, multiply it by your height, which is 35

Answer 16

ok

Answer 17

If you want me to double check your work when you're done I can (: