Mensurationhard · Past Paper
A square-based pyramid has a base area of 144 cm² and vertical height of 8 cm. Find its slant height.
A10 cm
B12 cm
C14 cm
D17 cm
✓ Correct Answer: A — 10 cm
Side of base a = sqrt(144) = 12 cm. Half side = 6 cm. l = sqrt(h² + (a/2)²) = sqrt(8² + 6²) = sqrt(64+36) = 10 cm.
Share this question
More from Mensuration
- Find the volume of a cylinder whose height is 21 cm and diameter is 10 cm.
- The length of a rectangle is increased by 20% and its breadth is decreased by 20%. The net change in area is:
- What is the ratio of the area of a circle to the area of its circumscribed square?
- The radius and height of a cone are in the ratio 3:4. If its curved surface area is 188.4 cm², find its radius (Take π = 3.14).
- Find the area of a quadrant of a circle whose radius is 7 cm.