Jawabanmu

2014-09-03T19:08:38+07:00
2014-09-03T19:09:10+07:00
T=s:v
A)t=400 m:10 m/s=40 sekon
B)t=800 m:10 m/s=80 sekon
C)t=1 km:10 m/s=1000 m:10 m/s=100 sekon
D)t=20 km:10 m/s=20000 m:10 m/s=2000 sekon