The van gets a head start and travels 35×.75km=26.25km in 3/4hrs so solve 35x+26.25=50x to get 1.75 hrs
Hey!
Let me help you along.
So when I approach this question I note that
- The score of the second student is dependent on the score of the first student
- The score of the first student is dependent on the score of the third student
- We don’t know the score of the third student and it is independent of the other students
So I’d go ahead and let the score of the third student be x
Then I would express the scores of the other two students in terms of the score of the third student (x) and then add these all up and solve for 164.
Give it a shot and let us know if you need more help!
***Beaten above but I will leave this here so one can understand how to approach such questions.