Jawabanmu

2014-09-09T19:31:05+07:00
78 km = 65 menit
6 km = 5 menit (dibagi 13)

5 menit = 6 km
25 menit = 30km (dikali 5)
Jawaban paling cerdas!
2014-09-09T19:31:49+07:00
1jam5menit = 65 menit
jadi, 
65/25 = 78/x
65.x   = 25.78
65x    = 1950
x        = 30