7040
21120 feet. 3 miles is only 15840.
3 feet in 1 yard yards = 21120/3 =7040
0.25
21120 ft/4 hours = 4 miles/4 hour = 1 mph
21120
4
4/21120 = 0.00018939
5280 feet = 1 mile so 21120 feet = 21120/5280 = 4 miles.
There are 1760 yards in one mile. Therefore, 21120 yards is equal to 21120/1760 = 12 miles.
There are 5280 feet in one mile. Therefore, 21120 feet is equal to 21120 / 5280 = 4 miles.
The second distance is greater.
21120