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2 years ago

Length of a rectangle is four times its width. If the perimeter is 100 m, what is the area in square cm?

Mathematics

1 answer:

melisa1 [442]2 years ago

6 0

Set the width to be x. Thus, the length is 4x.

The perimeter is 2(x+4x)=100, so x=10.

Plugging in x=10, you get that 4x=40.

So, the area of the rectangle is 400 $m^2$ .

Because there are 100 centimeters in a meter and you are asking for area, you must multiply by $100^2$ to get 4000000 $cm^2$ .

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2 years ago

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Klio2033 [76]

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2 years ago

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Fynjy0 [20]

Answer:

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2 years ago

How do you do this and what are the answers

scoray [572]

I can answer 1 to 4...
The area of a circle can be found by $\pi r^{2}$ . Reminder: $\pi = 3.14$ (usually used when finding out the area of a circle)

1. $4^{2} = 16$
$\pi *16$ or $3.14 * 16 = 50.24$
$50.24/4=12.56$

2. $6^{2} = 36$
$\pi *36$ or $3.14 * 36 = 113.04$
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(Not really sure if this is correct) 3. $2^{2}=4$
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2 years ago

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zysi [14]

1 1/4 because you must make improper fractions

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3 years ago

Read 2 more answers