Mensurationeasy · Past Paper
If the side of a cube is doubled, how many times will its total surface area increase?
A2 times
B4 times
C6 times
D8 times
✓ Correct Answer: B — 4 times
Area is proportional to the square of the side. (2a)² = 4a², so it increases 4 times.
Share this question
More from Mensuration
- A sphere and a cube have the same surface area. What is the ratio of the radius of the sphere to the side of the cube?
- Area of a square is increased by 69%. Side is increased by:
- The base and altitude of a triangle are in ratio 3:2. If the area is 108 sq. cm, find the base.
- Find the total surface area of a cube if one of its faces has an area of 49 sq. cm.
- Find the volume of a hemisphere of radius 10.5 cm.