Subject: mathqa
Question: two men a and b start from place x walking at 4 ½ kmph and 5 ¾ kmph respectively . how many km apart they are at the end of 4 ½ hours if they are walking in the same direction ?
Option: 
A: 5 5 / 8 km
B: 6 km
C: 7 km
D: 5 km
Answer: A