Answer:
296.5 miles
Step-by-step explanation:
Round trip distance of City X to City Y is 647 miles.
Round trip includes to and fro.
i.e. City X to City Y and then City Y to City X back.
Let the distance between City X and City Y = D
Distance traveled in round trip between City X and City Y = D + D = 2D
Given than 2D = 647
OR
D = [tex]\frac{647}2[/tex] = 323.5 miles
Kindly refer to the attached diagram, for the location of City Z.
Distance between XY = Distance from X to Z + Distance from Z to Y.
Distance XY = XZ +ZY
323.5 = 27 +ZY
ZY =296.5 miles