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Easy 8th grade math question?
A cylindrical glass vase is 6 inches in diameter
and 12 inches high. There are 3 inches of sand
in the vase, as shown below
Which of the following is closest to the volume
of the sand in the vase?
A 85 in. 3
B 254 in. 3
C 54 in. 3
D 339 in. 3
3 Answers
- 1 decade agoFavorite Answer
volume of the sand=3.14/4(d^2)xheight
=84.75 inch cube
so the answer is A
- 1 decade ago
Use the formula for volume of a cylinder, which is (pi)(radius²)(height)
So,
-you know pi=3.14
-you know radius=half diameter, so radius=3. Got that so far?
-Ok, you also know height, but be careful! It's not 12...that's the whole vase. You want volume of just the sand! So the height is 3 inches.
Now, plug in the values:
volume of sand = (3.14)(3²)(3)
=84.73 = 85 in.^3
