Răspunsuri

2014-03-17T21:10:02+02:00
Notez cu x-lungimea drumului
I 40/100*x
 rest r1=60/100*x
II 30/100*r1
   rest 70/100*r1=42 km ⇒ r1=100*42/70=60 km
60/100 *x=60 km ⇒ x=100 km
verificare
I 40/100*100 km=40 km
  rest 60 km
II 30/100*60 km=18 km
  rest 60-18=42 km
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