Answer :

There is 3 feet in a yard.
8 yards x 3 = 24 feet.
That means 8 yards is greater than 20 feet since 24 feet is > 20 feet. 
it is greater than because there are 3 feet in one yard. So that means you have to multiply 8 with 3 and you get 24 and 24 feet is greater than 20 feet.

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