SOLUTION: A car travelling at 60m/hr left Dehradun at 3pm. One hour later another car travelling at 80km/her started over the same road to overtake the first. How long must the second car tr

Algebra ->  Linear-equations -> SOLUTION: A car travelling at 60m/hr left Dehradun at 3pm. One hour later another car travelling at 80km/her started over the same road to overtake the first. How long must the second car tr      Log On


   

Question 426507: A car travelling at 60m/hr left Dehradun at 3pm. One hour later another car travelling at 80km/her started over the same road to overtake the first. How long must the second car travel ?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

One hour later another car ...

Let x and (x+1)represent the times of the second and first car respectively

Question states***   Note: d = r*t, distance the same for both cars

  60kmph(x+1) = 80kmph*x    |Note: using kmph for both, assuming typo

Solving for x

  60kmph = 20x

     3hr = x , time of the second car traveling 80kmph

CHECKING our Answer***

 4hr*60kmph = 80kmph*3hr = 240km