Jawabanmu

2014-09-04T01:18:11+07:00
A(percepatan) = 45 - 25 / 4 = 5 m/s^2
s = Vo.t + 1/2.a.t^2
   = 25.4 + 1/2.5.4^2
   = 100 + 40 = 140 m