Since Onur bikes 250 kilometers in a day, he bikes 5*250 = <<250*5=1250>>1250 kilometers for five days in a week.
Onur's friend Hanil bikes 40 more kilometers in a day than Onur, meaning he bikes for 250+40 = <<250+40=290>>290 kilometers.
In five days of the week, Hanil covers 290*5 = <<290*5=1450>>1450 kilometers.
In total, the two bikes for 1450+1250 = <<1450+1250=2700>>2700 kilometers in 5 days of a week.
#### 2700