Question

Please help me with the steps thx
find the area

Answer 1

D)
`222`
`km^2`

Explanation:

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Let's find the surface area of the rectangular prism.

Multiply 7 times 9 for the front side and 7 times 9 again for the back side.

`7*9=63`

`7*9=63`

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Multiply 7 times 3 for the left side and 7 times 3 again for the right side.

`7*3=21`

`7*3=21`

---------->>>>

Multiply 3 times 9 for the top side and again for the bottom side.

`3*9=27`

`3*9=27`

---------->>>>

Now, let's add all these sums.

`63+63+21+21+27+27=`

`126+42+54=`

`168+54=`

`=222`

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Hope this is helpful.