A cube has each edge 2 cm and cuboid is 1 cm long, 2 cm wide and 3 cm high. The paint in a certain container is sufficient to paint area equal to 54 cm². Which of the following is correct?
Question and options
A cube has each edge 2 cm and cuboid is 1 cm long, 2 cm wide and 3 cm high. The paint in a certain container is sufficient to paint area equal to 54 cm². Which of the following is correct?
- Only cube can be painted.
- Only cuboid can be painted.
- Both cube and cuboid can be painted.
- Neither cube nor cuboid can be painted.
Answer and explanation
Correct answer: C - Both cube and cuboid can be painted.
Cube SA = 6 x 4 = 24 cm^2; cuboid SA = 2(2+6+3) = 22 cm^2. Each is less than 54, and even together (46) they fit, so both can be painted.
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