Ruth is planning a 1543 mile trip to a math teachers conference in san diego. she plans to average 50 miles per hour on the trip. at that speed for how many hours will she be driving?

50 miles = 1 hour            
                             
                                 1543 / 50 = 30.36
                          It will take about 30 hours                             

Then why is the question on here if you know the answer