Jawabanmu

2014-08-29T14:00:45+07:00
     1:350.000
     120/100 x 350.000
     12/10 x 350.000
s' = 420.000

s = 17,5 km = 1.750.000 cm
sp = 1.750.000 : 420.000
sp = 4,167