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OpenStudy (openstudier777):
OpenStudy (openstudier777):
Please help.
jhonyy9 (jhonyy9):
how you see the first cylinder what height has ?
OpenStudy (openstudier777):
It has a height fo 12
jhonyy9 (jhonyy9):
yes and the second what height has ?
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OpenStudy (openstudier777):
9
jhonyy9 (jhonyy9):
right
so you know again that these cylinders are similar - yes ?
OpenStudy (openstudier777):
yes
jhonyy9 (jhonyy9):
do you know what mean this ?
OpenStudy (openstudier777):
no. sorry
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OpenStudy (openstudier777):
?
jhonyy9 (jhonyy9):
ok so than you dont know it i will tel you
this mean that how you see on this posted image there are marked just the height of cylinders and you know again that are similar so from this result that these cylinders has every measures equal just these marked height are different - ok ?
so from this result that has the same base too
jhonyy9 (jhonyy9):
and do you know formula of volume of a cylinder what is ?
OpenStudy (openstudier777):
v=pi*r^2*h
jhonyy9 (jhonyy9):
sorry just pir^2 what is ?
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OpenStudy (openstudier777):
What do you mean
jhonyy9 (jhonyy9):
pir^2 what mean there ?
OpenStudy (openstudier777):
pir^2*h right? Pir^2= 3.14 * r^2
jhonyy9 (jhonyy9):
no
so you know that pir^2*h is formula of volume of a cylinder - yes ?
but separate pir^2 what mean from there ?
OpenStudy (openstudier777):
Yes
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jhonyy9 (jhonyy9):
what is formula for area of a circle ?
OpenStudy (openstudier777):
Pi r ^2
jhonyy9 (jhonyy9):
exactly - so from this formula of volume of a cylinder what mean pir^2 ?
OpenStudy (openstudier777):
volume of a cylinder: area * h
jhonyy9 (jhonyy9):
area of the base
because a cylinder has a base of circle - yes ?
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OpenStudy (openstudier777):
yes
OpenStudy (openstudier777):
Oh I get it
OpenStudy (openstudier777):
Si wat from there?
jhonyy9 (jhonyy9):
so now you know that these cylinders has the same base bc. are similar so the ratio of these volume you get from the ratio of these marked height
ok. ?
OpenStudy (openstudier777):
Oh so it would be 4:3?
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jhonyy9 (jhonyy9):
why you wrote there ,,Si" are you italian ?
OpenStudy (openstudier777):
No it was an accident. lol
jhonyy9 (jhonyy9):
ok
jhonyy9 (jhonyy9):
how you get this 4/3 ?
OpenStudy (openstudier777):
The ratio of height to heigh 12:9 - 4:3
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OpenStudy (openstudier777):
If that is wrong, what would the answer be
jhonyy9 (jhonyy9):
yes this is right sure just i wan be sure that you know the way how you get it
so now do you understand it all ?