The difference between the distance traveled by the 2 balls = the distance traveled by the ball hit by Joe - the distance traveled by the ball hit by Edward
[Substitute the values.]
[Write the difference over the common denominator.]
[Subtract the numerators.]
[Divide both the numerator and the denominator by 7.]
The difference between the distances traveled by the two balls is 1 feet.
Correct Answer is : 1 feet