Answer
Yes, it violates the speed limit.
Work Step by Step
Converting 65 km/h to mi/h,
$\frac{65 km}{h}\times\frac{1 mi}{1.609km}$ = 40.40 mi/h
40.40 mi/h is more than the speed limit ( 40 mi/h). You probably would not get pulled over for going that speed though.
