The speeds of 3 trains in the ratio 3:9:12. The ratio between time taken by them to travel the same distance is?
Options:
A) 12:4:3
B) 1:2:3
C) 4:8:9
D) 6:5:2
E) 4:8:7
Ratio of time taken is = 1/3 : 1/9 : 1/12 = 12:4:3   12:4:3nswer is 12:4:3
<result>A</result>
The speeds of 3 trains in the ratio 3:9:12. The ratio between time taken by them to travel the same distance is?