The face that is shared with the rectangular prism is . The area of each base of the rectangular prism is square units. The lateral area (excluding the shared face) for the rectangular prism is square units. The total surface area of the composite figure will be square units.

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The answer is c: 279 Step-by-step explanation:

Answer:

The face that is shared with the rectangular prism is  

✔ 2(5)

.

The area of each base of the rectangular prism is  

✔ 10

square units.

The lateral area (excluding the shared face) for the rectangular prism is  

✔ 18

square units.

The total surface area of the composite figure will be  

✔ 66

square units.

Step-by-step explanation:

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