Answer:
D) [tex]222[/tex] [tex]km^2[/tex]
Step-by-step 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.
[tex]7*9=63[/tex]
[tex]7*9=63[/tex]
---------->>>>
Multiply 7 times 3 for the left side and 7 times 3 again for the right side.
[tex]7*3=21[/tex]
[tex]7*3=21[/tex]
---------->>>>
Multiply 3 times 9 for the top side and again for the bottom side.
[tex]3*9=27[/tex]
[tex]3*9=27[/tex]
---------->>>>
Now, let's add all these sums.
[tex]63+63+21+21+27+27=[/tex]
[tex]126+42+54=[/tex]
[tex]168+54=[/tex]
[tex]=222[/tex]
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Hope this is helpful.
