Jawabanmu

2014-04-15T13:44:57+07:00
Waktunya 25menit, 7.05-0.25= 6.40
2014-04-15T13:49:58+07:00
T = s / v
s = 6000m 
v = 4m/s
6000/4=1500=t
t=1500 s /25 mnt 
07.05 - 25mnt=06.40 
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