2024 · Q37
A cube whose edge is 14 cm long has on each of its faces a circle of 7 cm radius painted yellow. What is the total area of unpainted surface? (Takе π = 22/7)
Elementary MathematicsMensuration
- A126 square cm
- B189 square cm
- C252 square cm
- D315 square cm
Explanation
The unpainted area is the cube’s surface minus the six painted circles. That is 6 × 14² − 6 × (22/7) × 7² = 1176 − 924. The result is 252 sq cm, option (c).