Mensurationhard · Past Paper
Three cubes of sides 3cm, 4cm and 5cm are melted to form a single cube. Find the total surface area of the new cube.
A216 sq. cm
B150 sq. cm
C200 sq. cm
D250 sq. cm
✓ Correct Answer: A — 216 sq. cm
Vol = 3³ + 4³ + 5³ = 27 + 64 + 125 = 216. New side = 6 cm. TSA = 6 * 6² = 216 sq. cm.
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