Mensurationhard · Past Paper
A cylinder of height 12 cm and radius 3 cm is melted to form a cone of radius 3 cm. What will be the height of the cone?
A12 cm
B24 cm
C36 cm
D4 cm
✓ Correct Answer: C — 36 cm
Volume of cylinder = Volume of cone → πr^2h_cyl = (1/3)πr^2h_cone → 12 = (1/3)h_cone → h_cone = 36 cm.
Share this question
More from Mensuration
- Find the area of a trapezium whose parallel sides are 10 cm and 22 cm, and non-parallel sides are 10 cm each.
- If the volume of a cube is 64 cm³, what is the length of its side?
- If the volume of a cube is 1000 cm³, what is its total surface area?
- The side of a square is doubled. Its area becomes:
- If the perimeter of a semi-circle is 36 cm, what is its area?