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.
Share this question
More from Mensuration
- Percentage increase in area of circle if radius is increased by 100% is:
- Find the area of a triangle with sides 3, 4, 5.
- If the radius of a sphere is doubled, its surface area becomes how many times the original?
- A swimming pool is 20 m long, 15 m wide, and 2 m deep. Find its volume.
- A cuboid has volume 120 cm^3. If its length is 6 cm and breadth is 5 cm, find its height.