Mensurationhard · Past Paper
Three metal cubes of sides 3 cm, 4 cm, and 5 cm are melted to form a single cube. What is the side of the new cube?
A6 cm
B12 cm
C7 cm
D8 cm
✓ Correct Answer: A — 6 cm
Total volume = 3^3 + 4^3 + 5^3 = 27 + 64 + 125 = 216. Side = ∛216 = 6 cm.
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