Question

regra de três simples ​

Answer 1

Resposta:

a) 4 --- 15

20 --- x

20x = 15.4

20x = 60

x = 60/20

x = 3 dias

b) 20 --- 8

15 --- x

20x = 15.8

20x = 120

x = 120/20

x = 6min

c) 5 --- 12

30 --- x

30x = 12.5

30x = 60

x = 60/30

x = 2 dias

d) 80 --- 48

60 --- x

60x = 80.48

60x = 3840

x = 64min