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swat32
3 years ago
11

Prism A is similar to Prism B. The ratio of the surface area of Prism A to Prism B is 81:4. Find the volume ratio of Prism A to

Prism B.
Mathematics
1 answer:
Damm [24]3 years ago
8 0

Answer:

The volume ratio of Prism A to Prism B is \frac{729}{8}

Step-by-step explanation:

Step 1

Find the scale factor

we know that

If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared

Let

z-----> scale factor

x/y----> ratio of the surface area of Prism A to Prism B

so

z^{2}=\frac{x}{y}

we have

\frac{x}{y}=\frac{81}{4}

substitute

z^{2}=\frac{81}{4}

z=\frac{9}{2}

step 3

Find the volume ratio of Prism A to Prism B.

we know that

If two figures are similar, then the ratio of its volumes is equal to the scale factor elevated to the cube

Let

z-----> scale factor

x/y----> volume ratio of Prism A to Prism B

so

z^{3}=\frac{x}{y}

we have

z=\frac{9}{2}

substitute

(\frac{9}{2})^{3}=\frac{x}{y}

(\frac{729}{8})=\frac{x}{y}

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