Respostas

2013-06-06T18:49:12-03:00

80/20 = 4 voltas/min

4*28 = 112 voltas

3 4 3
2013-06-06T18:50:35-03:00

80        20

 

x            28

 

20x=80*28

20x=2240

x=2240/20

x=112 voltas

4 5 4