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gizmo_the_mogwai [7]
3 years ago
11

Sphere and a cylinder have the same radius and height. The volume of the cylinder is 64 meters cubed.

Mathematics
2 answers:
belka [17]3 years ago
5 0

Answer:

C. StartFraction 128 Over 3

Step-by-step explanation:

Volume of cylinder:

Pi × r² × h

h = 2r

Pi × r² × 2r = 64

Pi × r³ = 32

Volume of sphere:

(4/3)pi × r³

(4/3)(32)

128/3

Mrrafil [7]3 years ago
4 0

Answer:

C. 128/3 meters cubed

Step-by-step explanation:

The volume of a cylinder is denoted by: V=\pi r^2h, where r is the radius and h is the height. We know it's equal to 64, so we can set that equal to V:

V=\pi r^2h

64=\pi r^2h

We know that the sphere and cylinder have the same height and radius. However, the "height" of a sphere is actually the same as its diameter, which is twice its radius. Then, we can replace h in the above equation with 2r:

64=\pi r^2h

64=\pi r^2*2r=2\pi r^3

\pi r^3=64/2=32

Now, the volume of a sphere is denoted by: V=\frac{4}{3} \pi r^3, where r is the radius. From above, we know that \pi r^3=32, so we can plug this into the equation:

V=\frac{4}{3} \pi r^3

V=\frac{4}{3} *32=128/3

Thus, the answer is C.

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