Respostas

2014-07-20T21:11:36-03:00
S=So+V.T
300=240+80T
-80T=240-300
-80T=-60 .(-1)
80T=60
T=60/80
T=0.75
75% DE 1 hora são 45 minutos

t=45 minutos
7:30+45=8h 15 min