Solution:
Let speed of each rider = x miles/hour
Total time of travel = 3.5 hours
Keep in mind the relation between , distance , speed and time.
Distance = Speed × Time
Distance traveled by first rider = 3.5 × x = 3.5 x miles
Total distance traveled by three riders when they travel alone for 3.5 hours at the speed of x miles per hour= 3.5 x + 3.5 x+3.5 x= 10.5 x miles
When the three refers travel altogether , if the speed of each traveler is x miles per hour for 3.5 hours= 3.5 x miles, where x is speed of each traveler.
