im stuck whith volume lol,
can someone pls help me? thanks
2006-11-25 21:47:16 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
volume of cyllinder = area of circle times height
= Pi x radius x radius x height
remember its just the same as finding the volume of any prism.
find the area of the shape of the end then multiply by its length!!
2006-11-25 21:50:57 · answer #1 · answered by Anonymous · 0⤊ 0⤋
First of all, you need to find the area of the circle at the end of the cylinder.
The formula for the area of a circle is 3.14159r^2 (pi.r^2)
Now, you know the diameter is 7. The radius is half the diameter.
Radius = 7/2 = 3.5
So Area of Circle = 3.14159*3.5^2
= 38.48cm^2
Now to find the volume of cylinder
You times the area of the circle by the height of the cylinder
Volume of cylinder = 38.48x7
= 269.39cm^3
2006-11-25 21:57:41 · answer #2 · answered by Tigeress 2 · 0⤊ 1⤋
It has been a long time, but I seem to recall that the area of a circle is 2PyeR, so the volume of a cylinder would be 2PyeR x the height
2 X 3,14159 x 3.5 x 9
You do the maths
Assay is right. 2PyeR is the circumference! I said it was a long time!
It is PyeR squared times the height.
Anyway, you do the maths
2006-11-25 21:52:26 · answer #3 · answered by The Lone Gunman 6 · 0⤊ 0⤋
Well you do pi x radius x radius to find the area of the circle. So this is pi x 3.5 x 3.5 which gives you the area of the circle. Then multiply the answer by 9 because this is the height. Hope it helps.
2006-11-29 20:21:16 · answer #4 · answered by sweet_angel92 3 · 0⤊ 0⤋
I think it must be the area of the circle times the height.
The area will be Pi times 7cm or about 22cm2. So the volume must be 22 x 9 or 198
2006-11-25 21:53:27 · answer #5 · answered by Anonymous · 0⤊ 1⤋
volume of cylinder
V=(pi*d^2/4)*h
where h= height and d=diameter
V=pi*49/4*9
=441*pi/4=346.3605901 cc
therefore, volume of cylinder
=346.3605901 cc
i hope that this helps
2006-11-25 23:08:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋
1. Surface Area = 2*pi*r*h+pi*r^2 = 189*pi Volume = pi*r^2*h=490*pi 2. Surface Area = 2*pi*r*h+pi*r^2 = 275*pi Volume = pi*r^2*h=625*pi
2016-05-23 03:41:18 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Volume of Cylinder = pi x r x r x h
pi = 3.14
r = radius (half of the diameter)
h = height
Vol = 3.14 x 3.5cm x 3.5cm x 9cm
Vol = 346.36 cm3 (to 2 d.p. (decimal places))
PS as you multiplying cm (linear centimetres) by cm by cm then it comes centimetres cubed (cm3).
2006-11-29 08:56:41 · answer #8 · answered by lenpol7 7 · 0⤊ 0⤋
radius=diameter/2
=>radius=7/2
volume of cylinder=pi*(radius^2)*(height)
=(22/7)*(radius^2)*(height)
=>volume =(22/7)*(7/2)*(7/2)*9
=346.5
2006-11-25 21:54:48 · answer #9 · answered by adi 1 · 0⤊ 0⤋
Cylindrical volume = Pi x r x r x h
= 3.142 x 3.5 x 3.5 x 9
= 346.4055 cc
2006-11-29 10:10:17 · answer #10 · answered by Norrie 7 · 0⤊ 0⤋