In a race of 1600 m, if the ratio of the speeds of two participants A and C is 4:3, and C has a start of 240 m, then A beats C by:
160 m
As C has a start of 240m, C has to cover 1360m while A has to cover 1600m.
Now, when C covers 3m, A covers 4m.
Hence, when A covers 1600m, C covers 1600×34 = 1200m
Therefore, A beats C by (1600-1200-240) = 160m.