The total number of chairs is the product of the number of rows with the number of chairs per row. You can determine this using the dimensional analysis approach. The solution is as follows:
Number of chairs = Number of rows * Number of chairs/row
Since the the unit 'row' appears on both the numerator and denominator side, they will cancel out, leaving us with the number of chairs.
225 chairs = x*x = x², where x is the number of rows which is also equal to the number of chairs per row
x = √225 = 15
Thus, there are 15 rows with 15 chairs each row.
