Question

A square piece of cardboard of sides 15 cm is folded to make a cube of sides 5 cm.

Is there enough cardboard?

Answer 1

Explanation:

The 15 cm by 15 cm piece of cardboard area = 225 cm².

A cube has six congruent faces. If each edge is 5 cm, the surface area is 6×5² = 150 cm². So there is enough cardboard to make a cube, but not by folding. You'd have to do some cutting and taping.