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144-B7-2

3. A cube needs to be covered with square pieces of paper without overlapping. If
the length of the square piece of paper is 1 cm, how many pieces of square paper
are needed?

7 cm

8 cm

11 cm

4. Fill in the blank.

Surface area: 150 cm2
cm

5 cm

5 cm

5. The surface area of the following rectangular prism is 280 cm2. If the colored
faces are the bases, find the height of the rectangular prism.

5 cm

10 cm
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