Respuesta :

evgeniylevi

Answer:

11.5 [h].

Step-by-step explanation:

1) if the unknown time is 't', then

2) it is possible to make up the equation:

[tex]\frac{900}{9} =\frac{1150}{t};[/tex]

3) if to solve this equation, then t is:

t=1150*9/900=1150/100=11.5 [hours].