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## All Comments

(25) Jump to unreadPost a commentcan't believe i didn't think of that :?.

Outside Diameter Pi * 3squared * 8 = 226.19

Inside Diameter Pi * 1.5squared * 8 = 56.55 (should be 56.54 but rounds up?)

169.64 (this should be 169.65

And the answers right thanks alot stuck for hours repped :thumbsup:

First thing I tried wouldn't make sense becuase the volume would too big because you wouldn't be counting the big hole through the middle.

Not good with areas so I use the Pi & radius method?

first of all you need to find the radius which is half the length of the diameter, so the radius would be 3.

then using the pythagorus button (PI), or entering 3.14 so...

pi x r x r x h or 3.14 x 3 x 3 x 8 = 226.08 cm3 then possibly divide that by 2 and that should give you the answer of:

113.04cm3

hope this is right for you...

That seems to be wrong go here http://www.handymath.com/cgi-bin/tube2.cgi.

Knew the answer just wanted the method don't like cheating.

The answer btw is 169.65

first of all you need to find the radius which is half the length of the diameter, so the radius would be 3.

then using the pythagorus button (PI), or entering 3.14 so...

pi x r x r x h or 3.14 x 3 x 3 x 8 = 226.08 cm3 then possibly divide that by 2 and that should give you the answer of:

113.04cm3

hope this is right for you...

That gives me the volume if the hole wasn't there I see where your getting at though thanks :)

Ah finally I understand thanks :) and no worries.

pi times (3/2)squared and multiply by8 to give ans

pi times (3/2)squared and multiply by8 to give ans

Exactly what got me the answer :)

Got the old brain cells working again.

your welcome :thumbsup:

Got another one :oops: what do I do with the 2 diameters which are on two sides of a cuboid?

Not diameters just width and length.

lol...have a good one dude :thumbsup:

Sorry being lazy heres a pic.

Goodnight thanks mate :thumbsup: