CPM Homework Help : MC1 Problem 2-49

Jeri has a piece of rope that is $1.5$ feet long. If a board measured two lengths of the rope, how long is the board? What length could she mark if she measured out the rope three times? Make a diagram to justify your answer. Clearly explain your thinking.

Hint:

Think of the rope as a ruler that is $1.5$ feet long. If you had $2$ ropes that long,
how long would the combined rope be? What about if you had $3$ ropes of that length?

Answer:

The board is $3$ feet long, since she used the rope twice.

Using the rope $3$ times creates a length of $4.5$ feet.