Bunuel wrote:
marcuccio wrote:
Bunuel wrote:
[quote="tom09b"]If cylinder A has three times the height and one-third the diameter of cylinder B, what is the ratio of the volume of A to the volume of B?
A 3:1
B 1:1
C 1:3
D 1:9
E 1:27
\(Volume_A=\pi{r}^2*h\);
\(Volume_B=\pi{(3r)}^2*\frac{h}{3}=3\pi{r}^2*h\);
Ratio 1:3.
Answer: C.
Pay attention Bunuel
The question states that the cylinder A has 3 times the height and 1/3 the
DIAMETER of cylinder B
It means that 1/3 DIAMETER= 2/3 RADIUS !!!!!
DIAMETER= 2*RADIUS
The question implies that cylinder A has three times the height than the height of B and cylinder A has one-third the diameter than the diameter of B.[/quote]
What does it mean "one-third the diameter"???
It implies that 2/3 the radius.
Volume's formula use radius not diameter
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