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alainabbyboo22
Group Title
Find the volume of a cone with radius 30 in and slant height 50 in.
A. 3769.91 in3
B. 3768 in3
C. 113040 in3
D. 37699.11 in3
 one year ago
 one year ago
alainabbyboo22 Group Title
Find the volume of a cone with radius 30 in and slant height 50 in. A. 3769.91 in3 B. 3768 in3 C. 113040 in3 D. 37699.11 in3
 one year ago
 one year ago

This Question is Closed

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
can someone help me out here ? i keep trying to solve it but i'm doing something wrong here . @nubeer
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
hmm can you tell me the formula for vol of cone?
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
1/3 n r^2 h ?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
dw:1352739974313:dw
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
volume = 1/3* pi *r^2*hdw:1352740094367:dw can you find h?
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
this is what i got for my answer . 47123.8898038
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
nop you used 50 in calculations.. as its not the height in this case.. can u see the diagram i drew?
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
yes but now i'm confused on what to do . can you type the equation for me and i will solve ?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
well u first have to find the h.. h is the perpendicular height and its not given.. formula for cone is this. volume = 1/3* pi *r^2*h
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
maybe you can do your steps here so i can point your mistake.
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
i did : 1/3 * pi * 30^2 * 50
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
ok.. half is right .. the place where u had put 50 that is wrong. its not 50
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
what would i put there then ?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
ok.. would you able to see the picture if i draw here for u? because i posted pictures above but no respone about that from you.
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
so i am not sure if you are able to see pictures or something wrong.
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
dw:1352740718104:dw
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
ok can you see the picture now i just posted?
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
okay i see it . but what am i supposed to do ?
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
30 * 50 ?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
do u see the "h" with the dotted line?
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
yes
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
ok find the value of "h" by Pythagoras theorem.
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
so 50^2 + 30 ^2 = c^2 ?
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
not exactly.. the slanting height is "c" the base is "a" and height is "b"..
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
dw:1352741077853:dw
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
so c^2=a^2+b^2 c=50, a= 30 , b= h can you find h now?
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
1.6
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
nooo.. 50^2  30^2 = h^2
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
1600^2
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
yes h^2 = 1600.. now take square root to find h.
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
good.. this is your h now.. volume = 1/3* pi *r^2*h h=40, r =30 now plug it in formula.
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
A is my answer !!
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
yes its A :)
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
woops just double checked that ! its D . my bad !
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
lol.. sorry my bad too.. :P
 one year ago

alainabbyboo22 Group TitleBest ResponseYou've already chosen the best response.1
haha its all good ! it just made sense but then i looked at my answer again and i'm like wait a minute .. lol thank you for helping me !
 one year ago

nubeer Group TitleBest ResponseYou've already chosen the best response.1
lol you are most welcome anytime :)
 one year ago
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