11. john walked 10 miles on saturday. he walked twice as fast on the second 5 miles of his walk than he walked on the first 5 miles of his walk. which expression represents the time he spent walking? let x = john’s speed on the first half of the walk.
a) 15/x
b) 5/3x
c) 15/2x
d) 10/3x

The correct answer for the question that is being presented above is this one: "D) 10/3x." John walked 10 miles on Saturday. He walked twice as fast on the second 5 miles of his walk than he walked on the first 5 miles of his walk. The expression that represents the time he spent walking is this: D) 10/3x