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Lemur [1.5K]
3 years ago
9

PLEASE HELP!!!!

Mathematics
1 answer:
wel3 years ago
8 0

Answer:

Mike is not right

Step-by-step explanation:

we know that

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

Let

z----> the scale factor

x----> surface area of the enlarged rectangular prism

y-----> surface area of the original rectangular prism

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

so

In this problem we have

z=2

substitute

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

4=\frac{x}{y}

x=4y

so

The surface area of the enlarged rectangular prism is 4 times the surface area of the original rectangular prism

therefore

Mike is not right

<em>Verify with an example</em>

we have a rectangular prism

L=5\ m

W=2\ m

H=3\ m

The surface area of the prism is equal to

SA=2(LW)+(2L+2W)H

substitute the values

SA=2*(5*2)+(2*5+2*2)*3=62\ m^{2}

If he doubles each dimension of any rectangular prism

then

the new dimensions will be

L=5*2=10\ m

W=2*2=4\ m

H=3*2=6\ m

The new surface area will be

SA=2*(10*4)+(2*10+2*4)*6=248\ m^{2}

248/62=4

therefore

The surface area of the enlarged rectangular prism is 4 times the surface area of the original rectangular prism

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