In a 1 km race, A gives B a start of 120 m and C a start of 160 m. They all finish the race together. How much start can B give to C in order to finish the same race together?
1
\(55 \frac 4 {11} \) m
2
\(48 \frac 6 {11} \) m
3
\(45 \frac 5 {11} \) m
4
\(47 \frac 2 {11} \) m