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hmm can you tell me the formula for vol of cone?

1/3 n r^2 h ?

|dw:1352739974313:dw|

volume = 1/3* pi *r^2*h|dw:1352740094367:dw|
can you find h?

this is what i got for my answer . 47123.8898038

nop you used 50 in calculations.. as its not the height in this case.. can u see the diagram i drew?

yes but now i'm confused on what to do . can you type the equation for me and i will solve ?

maybe you can do your steps here so i can point your mistake.

i did :
1/3 * pi * 30^2 * 50

ok.. half is right .. the place where u had put 50 that is wrong. its not 50

what would i put there then ?

so i am not sure if you are able to see pictures or something wrong.

|dw:1352740718104:dw|

ok can you see the picture now i just posted?

okay i see it . but what am i supposed to do ?

30 * 50 ?

do u see the "h" with the dotted line?

yes

ok find the value of "h" by Pythagoras theorem.

so 50^2 + 30 ^2 = c^2 ?

not exactly..
the slanting height is "c" the base is "a" and height is "b"..

|dw:1352741077853:dw|

so c^2=a^2+b^2
c=50, a= 30 , b= h
can you find h now?

1.6

nooo..
50^2 - 30^2 = h^2

1600^2

yes h^2 = 1600.. now take square root to find h.

40

good.. this is your h now..
volume = 1/3* pi *r^2*h
h=40, r =30 now plug it in formula.

A is my answer !!

yes its A :)

woops just double checked that ! its D . my bad !

lol.. sorry my bad too.. :P

lol you are most welcome anytime :)