A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?

so you probably want the rate in hours, so you divide 7200 by 60 and then divide that by 60 again to get 2 hours, which is 150 km/2hours which you can then simplify to 75 km per hour

7200 s / 60 = 120 min 120 min / 60 =2 hr so 150 km / 2 hr = 75 km per hour