Question:
How many surfaces does the object have?
How many surfaces does the object have?
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Count the visible faces of the staircase-shaped block and add the hidden ones (the opposite side face, the back and the bottom).
Updated On: Nov 12, 2026
- 9
- 10
- 8
- 11
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The Correct Option is B
Solution and Explanation
The object is a solid with three steps.
Visible faces: the large left side face (1), the three horizontal treads including the top one (3), and the three vertical risers (3). That is 7 visible faces.
Hidden faces: the right side face (matching the left side), the back face and the bottom face, 3 more faces.
Total = 7 + 3 = 10 surfaces.
Answer: (2) 10
Visible faces: the large left side face (1), the three horizontal treads including the top one (3), and the three vertical risers (3). That is 7 visible faces.
Hidden faces: the right side face (matching the left side), the back face and the bottom face, 3 more faces.
Total = 7 + 3 = 10 surfaces.
Answer: (2) 10
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