i have a cone that has 2 inches in radius and the volume is 79.59in3
formula= 1/3.b.h now i have to find the height with this info.. what did u guys get for an answer?
2006-11-11 14:10:33 · 6 answers · asked by Jen 1 in Science & Mathematics ➔ Mathematics
79.59 = (1/3)(2^2 pi)h
79.59 = (1/3)(4pi) h
3(79.59)/(4pi) = h
19.0007 = h
2006-11-11 14:16:20 · answer #1 · answered by MsMath 7 · 4⤊ 5⤋
You're using the wrong formula.
Volume = 1/3(b)(h)
is the formula for a pyramid BUT you have a cone. The formula for that is
Volume = 1/3(pi)(r^2)(h)
Try again, because 2.11 is the wrong answer.
2006-11-11 22:20:30 · answer #2 · answered by Crystal 3 · 6⤊ 0⤋
No, the formula for volume of cone is 1/3(pi)r^2h
Volume = 79.59in^3
[1/3](pi)r^2h = 79.59
[1/3][22/7][2*2]h = 79.59
(22/21)*4h = 79.59
88h/21 = 79.59
88h = 79.59*21
88h = 1671.39
h = 1671.39/88
h = 18.993068181818181818181818181818...
h = 19 inches (approximately)
2006-11-11 22:24:47 · answer #3 · answered by Akilesh - Internet Undertaker 7 · 5⤊ 0⤋
The area of the base = pi * r^2 = 12.56637
and the formula is 1/3bh so plug it in
79.59 = 1/3 (12.56637)h
= 19.0007138
Your answer is wrong. Sorry.
2006-11-11 22:18:07 · answer #4 · answered by Anonymous · 6⤊ 0⤋
b=1^2*Ï
V=(1/3)*Ï*h=79.59in^3
79.59*3/Ï=h
h=76in
2006-11-11 23:08:00 · answer #5 · answered by yupchagee 7 · 3⤊ 0⤋
19.0007
2006-11-12 12:25:07 · answer #6 · answered by DiamondQueen 2 · 3⤊ 0⤋