A bowling alley keeps shoes in rows of cubbyholes. There are 9 rows of cubbyholes,with 20 cubbyholes in each row. If there is a pair of shoes in every cubbyhole, how many pairs of shoes are there?
If there were 20 cubbyholes in each row, and there are 9 rows. Simply, multiply the amount of cubbyholes in a row and the amount of rows. In this case, there would be 180 pairs of shoes.
