Răspunsuri

2014-04-22T01:42:22+03:00
10t..................6,5
1t.....................x
x=1*6,5/10
x=0.65tone
1 5 1
2014-04-22T07:31:34+03:00

10  țevi- 65 tone

1 țeavă- ?

65 tone: 10=0.65 tone

1 1 1