PHYSICS MOTION QUESTIONS!!!!!!!!!!!!?

1st answer is 1:4 taking time to be t in both cases as it is given specific instant and Instant means the same time.. so we know distance=speed x time so distance1=speed1 x time1 ratio distance2=speed2 x time2.. putting values distance1=1u x t and distance 2=4u x t taking D1 : D2 = 1 ut/4ut=1:4.. and in second question can u tel me the meaning of '^'?? Thanx