SOLUTION: Sophia sets off on a walk at a speed of 6km/h. 10 minutes later, her brother Ali sets off her on his bicycle at 15km/h. How far must Ali go to catch up with Sophia?
Question 697209: Sophia sets off on a walk at a speed of 6km/h. 10 minutes later, her brother Ali sets off her on his bicycle at 15km/h. How far must Ali go to catch up with Sophia? Answer by 03008082502(3) (Show Source):