The information's already provided in the question should be looked at first before trying to solve the problem. Based on those given information's the answer to the question can be easily deduced.
Distance traveled by the Ferrari = 250 Km
Time taken to cover the distance by the Ferrari = 1.5 hours
Then
Speed at which the Ferrari is traveling = 250/1.5 km/hour
= 2500/15 km/hr
= 166.66 km/hr
So the Ferrari travels at a speed of 166.66 km/hr. I hope it helped.