The total surface area of a cube is 864 cm2. What is its volume (in cm3)?
Answer & explanation
Correct answer: option 2
We know that,
Total surface area of cube = 6a2
We know that,
Total surface area of cube = 864
6a2 = 864
= a2 = \(\frac{864}{6}\) = 144
= a = \(\sqrt {144}\) = 12
Volume of cube = 12 × 12 × 12 = 1728