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find the volume of a cylinder with a radius of 2.5 inches,height of 4 inches, use 3.14 for pie?
15cm,7cm= find the volume of the cone, use 3.14 for pie

2006-07-18 13:42:32 · 6 answers · asked by Anonymous in Science & Mathematics Mathematics

6 answers

cylinder = 78.5 cubic inches
cone = 1648.5 cubic cm
pyramid = 1.02 cubic m

2006-07-18 13:53:44 · answer #1 · answered by Paul 2 · 0 0

Volume for a pyramid is l x w x h x 1/3.
v = (1.7 x 0.9 x 2) x 1/3
v = 3.06 x 1/3
v= 1.02

Cylinder is pi x r^2 x height
v = 3.14 x 2.5^2 x 4
v = 3.14 x 6.25 x 4
v = 78.5

cone is (pi x d^2 x h) / 12
if diameter is 15 and height is 7
v = (3.14 x 15^2 x 7) / 12
v = (3.14 x 225 x 7) / 12
v = 4945.5 / 12
v = 412.125 (or 412 1/8)

if diameter is 7 and height is 15
v = (3.14 x 7^2 x 15) / 12
v = (3.14 x 49 x 15) / 12
v = 2307.9 / 12
v = 192.325 (or 192 3/8)

Good luck.

2006-07-18 20:59:35 · answer #2 · answered by Thufir 3 · 0 0

Pyramid Volume
V = (LWH)/3
V = (1.7 * .9 * 2)/3
V = (3.06)/3
V = 1.02m^3

-----------------------------------

Cylinder Volume
V = pi * h * r^2
V = (3.14)(4)(2.5)^2
V = (3.14)(4)(6.25)
V = (3.14)(25)
V = 78.5in.^3

----------------------------------

Cone Volume
V = (pi * h * r^2)/3
V = (3.14 * 15 * 7^2)/3
V = (3.14 * 15 * 49)/3
V = (2307.9)/3
V = 769.3cm^3

but if you meant for the height to be 15 and not 7

V = (3.14 * 7 * 15^2)/3
V = (3.14 * 7 * 225)/3
V = (4945.5)/3
V = 1648.5cm^3

2006-07-18 21:47:37 · answer #3 · answered by Sherman81 6 · 0 0

Yep! do your own homework

2006-07-18 20:46:49 · answer #4 · answered by curly 2 · 0 0

Do your own homework.

2006-07-18 20:45:18 · answer #5 · answered by Anonymous · 0 0

okay have fun with that

2006-07-18 20:47:52 · answer #6 · answered by Sherry D 2 · 0 0

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