250 km/hr
Step-by-step explanation:
Simply really, if it goes 500 in two hrs, assuming that it’s at a constant speed, then it went 250 in each hr.
So if it’s at a constant speed, then it’s flying at 250km/hr.
Considering the question doesn’t say the speed is inconsistent, then we just go with what we know, and choose option C.
Hope this helps!