Respostas

2013-12-12T16:38:10-02:00

Regra de três

 

5 -------- 150
20 ------ x
5x= 150.20
5x= 3000
x= 3000/5
x = 600 km

2013-12-12T16:38:55-02:00
5cm------150 km
20cm ----- x

5x=3000
x=3000/5
x= 600 km