Truck A can cover 350 km distance with speed of X km/hour while Truck B can cover 480 km distance with speed of Y km/hour, if time taken by Truck B is 14.28% less than the time taken by Truck A, then find the ratio of X : Y ?
1
6 : 2
2
8 : 3
3
5 : 8
4
9 : 5
5
9 : 6