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Nina [5.8K]
1 year ago
11

I need help finding the surface area of this composite figure.

Mathematics
1 answer:
eduard1 year ago
6 0

The surface area of the Figure is 498 cm per square.

According to the statement

we have to find the surface area of the cuboid.

So, For this purpose, we know that the

Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape

And the formula become SA=2lw+2lh+2hw.

From the given information:

The length of the cuboid = 7cm

The width of the cuboid = 2cm

The height of the cuboid = 2cm

Use the formula which is

SA=2lw+2lh+2hw

Substitute the values in it

then

SA=2*7*2+2*7*2+2*2*2

SA=28+28+8

SA=64 cm per square.

And from another cuboid is :

The length of the cuboid = 7cm

The width of the cuboid = 7cm

The height of the cuboid = 12cm

Use the formula which is

SA=2lw+2lh+2hw

Substitute the values in it

then

SA=2*7*7+2*7*12+2*12*7

SA=98+168+168

SA= 434 cm per square.

Total area of figure = 434+64 = 498.

So, The surface area of the figure is 498 cm per square.

Learn more about cuboid here

brainly.com/question/46030

#SPJ9

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44 hours

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1

Step-by-step explanation:

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6 0
3 years ago
Solve a/7 = 9 please help ​
dimaraw [331]

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7 0
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Will someone plz help me this us due and I am confused
mihalych1998 [28]

Hey there! I would love to help you.

Question 1: In both questions, we have to find the repeating decimal as a fraction. There is a specific way to find the fraction given a repeated decimal. In our equation, our variable x will represent the fraction.

x=0.272727....

If you know how too solve systems of equations by elimination, we need to to do something similar to eliminate all of the repeating parts so we can solve for x.

We need to make this a number greater than zero but line up the digits so that we can eliminate every single repeating digit.

To do this, we move the digit as many times to the right as there are digits that repeat. In this case, there are two repeating digits, so we multiply the whole equation by 100.

100x=27.2727...

Now, we can subtract the first equation from the second  so that the repeating parts are removed and we can then solve for x and find our fraction.

99x=27

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x=27/99

Now we subtract this from the first fraction.

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To make this into a repeating decimal, we just divide the numerator by the denominator.

1.560606060...

As we can see, the 60 is repeating, so the answer is the second option on the first one.

Question 2: In this case, we have two repeating decimals. Let's solve for them both. Because we have a digit after the decimal that does not repeat, we need to move it before we subtract.

10x=4.090909...

We need to line up the decimals, and in this case we need to multiply by 1000.

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Now we subtract...

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10x=6.81818181...

We multiply by 100 to line up the decimals for subtraction.

1000x=681.8181....

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x=15/22

Now, we add our fractions.

24/22 or 1 2/22

Now we turn it back into a repeating.

24/22= 1.09090909...

For this question, select the second option.

I hope this helps!

7 0
3 years ago
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