Question

Lisa is making a small box to store beads. The lid of the box is 5 cm. She wants to put a strip of velvet along the length of one side of the lid. How to find the length of the lid?

Answer 1

The first thing we are going to assume is that we have the perimeter of the lid, which is given by:
 P = 5 cm
 We will also assume that the box is square, then the lid is also square.
 Therefore the perimeter is given by:
 P = 4L
 Where,
 L: side
 We cleared L:
 L = P / 4
 Substituting:
 L = 5/4 cm
 L = 1.25 cm
 Answer:
 the length of the lid is:
 L = 1.25 cm