Which pair of measurements is not equivalent?

24 feet, 8 yards

24 inches, 2 feet

10 feet, 120 inches

3 miles, 15,480 feet

If you would like to know which pair of measurements is not equivalent, you can calculate this using the following steps:

1 yard = 3 feet

1 foot = 12 inches

1 mile = 5280 feet

8 yards = 8 * 3 feet = 24 feet

2 feet = 2 * 12 inches = 24 inches

10 feet = 10 * 12 inches = 120 inches

3 miles = 3 * 5280 feet = 15,840 feet

Not equivalent: 3 miles, 15,480 feet.