Mensurationmedium · Past Paper
The area of the curved surface of a cone is 308 cm² and its radius is 7 cm. Find its slant height.
A7 cm
B10 cm
C14 cm
D21 cm
✓ Correct Answer: C — 14 cm
πrl = 308 => (22/7) * 7 * l = 308 => 22l = 308 => l = 14 cm.
Share this question
More from Mensuration
- The area of a circle inscribed in a square of side 14 cm is:
- Find the area of a triangle with sides 3, 4, 5.
- If the radius of a circle is 7 cm, what is its area? (Take pi = 22/7)
- Four equal circles are described about the four corners of a square of side 14 cm so that each touches two of the others. Find the area of the remaining part of the square.
- If the base radius of a cone is 3 cm and its height is 4 cm, find its volume.