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Mathematics 18 Online
OpenStudy (anonymous):

Volume is about

OpenStudy (anonymous):

OpenStudy (anonymous):

h=rtan88 V = 0.33 x pi x r^2 x h

OpenStudy (anonymous):

i am little confuse

OpenStudy (anonymous):

see the cone. do u see a right angle with an angle of magnitude 88 degrees ??

OpenStudy (anonymous):

Volume of cone =\[(1/3)\pi r ^{2}h\]r is 18 from diagram To find h, first find the angle; angle shares 180 degrees with angle 112 degrees. So 180-112=68. him1618 made a little mistake. With that angle you can find h with tan. Put all the info the r, the h in formula above to find volume of cone.

OpenStudy (anonymous):

how am i need to set it up

OpenStudy (anonymous):

V=(1/3)pi r^2 h Fill in r and h

OpenStudy (anonymous):

so i use r

OpenStudy (anonymous):

i got 108pih

OpenStudy (anonymous):

r is given 18

OpenStudy (anonymous):

and when u done can u help me with http://openstudy.com/groups/mathematics/updates/4dec39134c0e8b0bacdbc5d8

OpenStudy (anonymous):

and how can i find the h

OpenStudy (anonymous):

Read note from him1618 and me above.

OpenStudy (anonymous):

why 88

OpenStudy (anonymous):

He made a mistake, it is 68. (180-112=68)

OpenStudy (anonymous):

so 68 is h right

OpenStudy (anonymous):

68 degrees is the angle theta, next to angle 112 degrees.

OpenStudy (anonymous):

i got 44.55 for h

OpenStudy (anonymous):

h=rtan68

OpenStudy (anonymous):

now i got v is 15115.4

OpenStudy (anonymous):

i did that 18*tan(68)

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