Răspunsuri

2014-05-08T19:19:27+03:00
D -nr. km distantei propuse
d:2+240km=d:4 /x4 =>
=> d:2+960km=d /x2=>
=>d+1920km=d =>
=>2xd=1920km=>
=>d=1920:2=>
=>d=960km