A train travelled from station P to Q in 8 hours and came back from station Q to P is 6 hours. What would be the ratio of the speed of the train while traveling from station P to Q to that from station Q to P?	Choose the correct answer:
A) 3:6
B) 3:1
C) 3:8
D) 3:4
E) 3:2
Since S # 1/t   S1 : S2 = 1/t1 : 1/t2   = 1/8 : 1/6   = 3 : 4   Answer: 3:4
<result>D</result>
A train travelled from station P to Q in 8 hours and came back from station Q to P is 6 hours. What would be the ratio of the speed of the train while traveling from station P to Q to that from station Q to P?