Mensurationeasy · Past Paper
Calculate the surface area of a sphere if its radius is 0.7 cm.
A6.16 sq. cm
B0.616 sq. cm
C61.6 sq. cm
D616 sq. cm
✓ Correct Answer: A — 6.16 sq. cm
Surface Area = 4πr² = 4 * (22/7) * 0.7 * 0.7 = 4 * 22 * 0.1 * 0.7 = 6.16 sq. cm.
Share this question
More from Mensuration
- A cone has a volume of 314 cm^3 and a height of 12 cm. Find its base radius (Take π = 3.14).
- The total surface area of a right circular cone is 90π sq. cm. If its radius is 5 cm, find its slant height.
- Find the volume of a right circular cylinder if its radius is 3.5 cm and height is 10 cm.
- A path 2 meters wide is built outside around a square field of side 10 meters. What is the area of the path?
- A sphere and a cylinder have the same radius 'r'. If their volumes are equal, find the height of the cylinder in terms of 'r'.