speed = distance/time, You can kind of tell that, because the units of speed is km/h ( or m/s, or miles/hour — depending on the situation).
Now if you apply your algebra skills, you might discover that
time = distance/speed
Plug in the data: time = 100 km / (80 km/h) After application of algebra skills again you can see that the units will simplify to simply h. time = 1.25 h
