Mensurationmedium · Past Paper
The curved surface area of a right circular cone is 12320 sq. cm. If the radius of its base is 56 cm, find its slant height.
A70 cm
B80 cm
C60 cm
D100 cm
✓ Correct Answer: A — 70 cm
CSA = πrl. 12320 = (22/7) * 56 * l. 12320 = 176 * l. l = 12320 / 176 = 70 cm.
Share this question
More from Mensuration
- The inner radius of a pipe is 2 cm and length is 7 m. Find the volume of water it can hold.
- If the area of a circle is A, then the area of a circle with triple the circumference is:
- A metal sphere of radius 6 cm is melted and recast into small spheres of radius 2 cm each. Find the number of small spheres.
- What is the volume of a right circular cylinder if its height is equal to its diameter 'd'?
- What is the volume of a sphere whose radius is 3 cm? (Leave answer in terms of π)