Jawabanmu

2014-08-25T19:05:20+07:00
V : 120 km/jam
s : 15 km

t :  \frac{s}{v} =  \frac{15}{120} =  \frac{1}{8} = 0,125 jam
0,125 jam = 7 menit 30 detik

Maap klo salah