Cube and Cuboid Questions and Answers
Practice ModeShowing 10 of 30 questions
Q11
What is the surface area of a cube with side length 5cm?
Answer: Option B
Explanation: Surface area of cube = 6 × side² = 6 × 25 = 150 cm²
Q12
How many small cubes have no face painted when a 3x3x3 cube is painted and cut?
Answer: Option B
Explanation: In a 3x3x3 cube, only the center cube is completely unpainted.
Q13
A cube has a volume of 64 cm³. What is the length of one side?
Answer: Option B
Explanation: Volume = side³ = 64, so side = ∛64 = 4 cm
Q14
How many small cubes have exactly one face painted in a 4x4x4 painted cube?
Answer: Option C
Explanation: Cubes with one face painted are in the center of each face. Each face has 2x2 = 4 such cubes, and there are 6 faces, so 6 × 4 = 24 cubes.
Q15
What is the total surface area of a cuboid with dimensions 6cm x 4cm x 3cm?
Answer: Option B
Explanation: Surface area = 2(lb + bh + hl) = 2(6×4 + 4×3 + 3×6) = 2(24 + 12 + 18) = 2×54 = 108 cm²
Q16
How many small cubes have three faces painted in any painted cube cut into smaller cubes?
Answer: Option C
Explanation: Only the corner cubes have three faces painted. A cube always has 8 corners.
Q17
A cube has a surface area of 96 cm². What is its volume?
Answer: Option B
Explanation: Surface area = 6 × side² = 96, so side² = 16, side = 4 cm. Volume = side³ = 4³ = 64 cm³
Q18
How many edges does a cuboid have?
Answer: Option B
Explanation: Like a cube, a cuboid also has 12 edges.
Q19
A 5x5x5 cube is painted and cut into smaller cubes. How many small cubes are there in total?
Answer: Option B
Explanation: Total cubes = 5 × 5 × 5 = 125
Q20
What is the volume of a cube with side length 7cm?
Answer: Option B
Explanation: Volume = side³ = 7 × 7 × 7 = 343 cm³