Answer :
The question is not clear, but I'll take a crack at what I think you're asking:
Driving at 20 km/hour, it takes 45/20 = 2.25 hours to cover 45 km.
That's 2 hours and 15 minutes.
Driving at 20 km/hour, it takes 45/20 = 2.25 hours to cover 45 km.
That's 2 hours and 15 minutes.
