A certain distance is covered at a certain speed. If one-third of the distance is covered in thrice time, what is the ratio of two speeds?
1
9 ∶ 4
2
19 ∶ 1
3
9 ∶ 1
4
1 ∶ 9
A certain distance is covered at a certain speed. If one-third of the distance is covered in thrice time, what is the ratio of two speeds?