Question

Mona loves making beaded necklaces. Today, she has a string that is 20 centimeters long. She leaves 2 centimeters on each end. Then, she fills the rest of the string with little beads that are 4 millimeters wide. How many little beads will she need?

Answer 1

40 beads

Explanation:

First, let's find the length of string that the beads will be on.

The string is originally 20 cm, but 2 cm is taken off each side.

So, the string that the beads will be on is only 16 cm now.

Each bead is 4 mm wide, so we have to convert the bead width to centimeters.

4/10=0.4

So each bead is 0.4 cm.

Now to find how many beads will fit, we have to divide the length by the width of the bead.

16/0.4=40

So, Mona will need 40 beads. Hope this helps ;)