Question

is 3 yards greater than less than or equal to 21 feet

Answer 1

Since a yard is 3 feet, then 3 times 3 is 9 and that is less than 21.

Answer 2

1 yard = 3 feet
3 yards = 3 * 3 feet = 9 feet

9 feet is less than 21 feet.

Therefore, 3 yards is less than 21 feet.