Answer: 15 feet
Explanation:
There are 3 feet in 1 yard. You need 5 yards. You could add 3+3+3+3+3 to get 15
A quicker way is to multiply 3×5 = 15.
Some teachers like unit multipliers:
3 ft/yd × 5yd/1
The yd in the denominator of the first factor cancels the yd in the numerator of the second factor. So you end up with 3ft× 5 = 15ft.