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Mathematics 8 Online
OpenStudy (volleyballlover55):

help!

OpenStudy (volleyballlover55):

OpenStudy (agent0smith):

Find the volumes, then find the difference (subtract them)

OpenStudy (volleyballlover55):

ok i dont know what the formula is though to solve it..

undeadknight26 (undeadknight26):

He gave you them in the link.

undeadknight26 (undeadknight26):

Just plug in and solve.

OpenStudy (volleyballlover55):

i know but i dont know what to plug in...

undeadknight26 (undeadknight26):

It's very very simple I'm not sure what's losing you.

OpenStudy (volleyballlover55):

can you help me please.. like can you give me the formula once and then ill probably understand.. :)

OpenStudy (agent0smith):

Look at your diagrams given in the question. Look at the diagrams and formulas I gave. Do that several times, if necessary.

undeadknight26 (undeadknight26):

For cylinders it's: r = 2 h = 4 For Circle it's: r = 2.

undeadknight26 (undeadknight26):

Replace the letter with the number and solve.

OpenStudy (volleyballlover55):

ok so is this correct? 3.14*2^2*4?

undeadknight26 (undeadknight26):

Yes. Plug it into a calculator or do what you want.

OpenStudy (volleyballlover55):

ok

undeadknight26 (undeadknight26):

Any who now that Agent is back I shall go help some one else, Agent has this :)

OpenStudy (volleyballlover55):

i got 50.24?

undeadknight26 (undeadknight26):

Yes according to wolfram that would be correct.

undeadknight26 (undeadknight26):

As for the circle?

OpenStudy (volleyballlover55):

ok.. 3.14*2^2?

OpenStudy (volleyballlover55):

@agent0smith

undeadknight26 (undeadknight26):

It's more of (3.14*2^2)/3

undeadknight26 (undeadknight26):

Sorry was working it out.

OpenStudy (volleyballlover55):

oh its ok

undeadknight26 (undeadknight26):

Wait wait I think I made a mistake.

OpenStudy (volleyballlover55):

4.1

OpenStudy (volleyballlover55):

@agent0smith please help me... i dont want to get it wrong

undeadknight26 (undeadknight26):

For the cylinder it would be: (4/3)pi2^3

undeadknight26 (undeadknight26):

The answer to this should be 33.51

undeadknight26 (undeadknight26):

To answer your question you'd do 50.27 -33.51 = 16.75

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