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Mathematics 26 Online
OpenStudy (errinss):

im stuck

OpenStudy (errinss):

OpenStudy (er.mohd.amir):

its very simple

OpenStudy (er.mohd.amir):

radius=diameter/2 vol v=(1/3)pi*r*r*h where r is radius

OpenStudy (errinss):

\[V=\frac{ 1 }{ 3 }(\pi)*8^2*17\] right?

OpenStudy (mathmate):

Right, plug in the numbers on your calculator!

OpenStudy (er.mohd.amir):

no first find h with the help of slant height

OpenStudy (errinss):

@agent0smith

OpenStudy (agent0smith):

Use pythag to find h first. Notice the right triangle, r, h, and 17.

OpenStudy (errinss):

i dont get it

OpenStudy (errinss):

i know the radius is 8

OpenStudy (er.mohd.amir):

use Pythagoras theorem in triangle BDE

OpenStudy (agent0smith):

Look at the diagram, the radius (which you have), h, and 17 make a right triangle

OpenStudy (agent0smith):

So use that to find h.

OpenStudy (errinss):

\[8^2+B^2=17^2\] this is what it should look like right?

OpenStudy (errinss):

b being H

OpenStudy (er.mohd.amir):

correct

OpenStudy (agent0smith):

Yes, once you solve for h, THEN you can use the formula for the volume

OpenStudy (errinss):

289=17^2 64=64 \[289-64=225\] \[\sqrt{225}=15\] H=15 right?

OpenStudy (agent0smith):

Yes, now find the volume

OpenStudy (errinss):

\[V=\frac{ 1 }{ 3 }*\pi*8^2*15\] \[V=\frac{ 1 }{ 3 }*\pi*64*15\] \[V=\frac{ 1 }{ 3 }*\pi*960\] \[V=1/3*3015.92\] \[V=1005.30\]

OpenStudy (errinss):

i did something wrong, my answer isn't a choice

OpenStudy (agent0smith):

It's reeeeeeally close though lol.... they did say to use 3.14 for pi ;)

OpenStudy (errinss):

ha i see what i did wrong lol

OpenStudy (errinss):

\[V=\frac{ 1 }{ 3 }*3014.4\] \[V=1004.8\]

OpenStudy (errinss):

*pat my back* lol XP

OpenStudy (errinss):

thx smith ^-^

OpenStudy (errinss):

OpenStudy (agent0smith):

*pats you on the back* make a new question

OpenStudy (errinss):

you sound like a moderator lol >.<

OpenStudy (elijahrich1113):

do you still need help?

OpenStudy (agent0smith):

Questions get too long and this is completely unrelated to the first one :P

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