Jawabanmu

2014-05-16T19:43:03+07:00
Vo = 18 km/jam = 5m/s, a = 5 m/s², t = 4 detik
Maka Vt = Vo + at
               = 5 + (5)(4)
               = 5 + 20
           Vt = 25 m/s