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Cylinders [tex]\(A\)[/tex] and [tex]\(B\)[/tex] are similar solids. The base of cylinder [tex]\(A\)[/tex] has a circumference of [tex]\(4 \pi\)[/tex] units. The base of cylinder [tex]\(B\)[/tex] has an area of [tex]\(9 \pi\)[/tex] units.

The dimensions of cylinder [tex]\(A\)[/tex] are multiplied by what factor to produce the corresponding dimensions of cylinder [tex]\(B\)[/tex]?

A. [tex]\(\frac{4}{9}\)[/tex]

B. [tex]\(\frac{2}{3}\)[/tex]

C. [tex]\(\frac{3}{2}\)[/tex]

D. [tex]\(\frac{9}{4}\)[/tex]


Sagot :

To determine the scaling factor that transforms the dimensions of cylinder [tex]\(A\)[/tex] into the dimensions of cylinder [tex]\(B\)[/tex], we need to follow a series of steps.

1. Compute the radius of cylinder [tex]\(A\)[/tex]:
The circumference of cylinder [tex]\(A\)[/tex] is given as [tex]\(4 \pi\)[/tex] units. The formula for the circumference of a circle is:
[tex]\[ \text{Circumference} = 2 \pi r \][/tex]
Where [tex]\(r\)[/tex] is the radius. We can solve for [tex]\(r\)[/tex] by setting:
[tex]\[ 2 \pi r = 4 \pi \][/tex]
Dividing both sides by [tex]\(2 \pi\)[/tex]:
[tex]\[ r = \frac{4 \pi}{2 \pi} = 2 \][/tex]
Thus, the radius of the base of cylinder [tex]\(A\)[/tex] is [tex]\(2\)[/tex] units.

2. Compute the radius of cylinder [tex]\(B\)[/tex]:
The area of the base of cylinder [tex]\(B\)[/tex] is given as [tex]\(9 \pi\)[/tex] units. The formula for the area of a circle is:
[tex]\[ \text{Area} = \pi r^2 \][/tex]
Where [tex]\(r\)[/tex] is the radius. We can solve for [tex]\(r\)[/tex] by setting:
[tex]\[ \pi r^2 = 9 \pi \][/tex]
Dividing both sides by [tex]\(\pi\)[/tex]:
[tex]\[ r^2 = 9 \][/tex]
Taking the square root of both sides:
[tex]\[ r = \sqrt{9} = 3 \][/tex]
Thus, the radius of the base of cylinder [tex]\(B\)[/tex] is [tex]\(3\)[/tex] units.

3. Determine the scaling factor:
The scaling factor is the ratio of the radius of cylinder [tex]\(B\)[/tex] to the radius of cylinder [tex]\(A\)[/tex]:
[tex]\[ \text{Scaling factor} = \frac{\text{radius of cylinder } B}{\text{radius of cylinder } A} = \frac{3}{2} \][/tex]

Thus, the factor by which the dimensions of cylinder [tex]\(A\)[/tex] are scaled to produce the corresponding dimensions of cylinder [tex]\(B\)[/tex] is [tex]\(\boxed{\frac{3}{2}}\)[/tex].