# SOLUTION: the distance from brampton to peterborough is 240 km. Chris is able to drive at an average speed of 100km/h along highway 401 and 80km/h on highway 115. If the total trip takes 2.5

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Finance -> SOLUTION: the distance from brampton to peterborough is 240 km. Chris is able to drive at an average speed of 100km/h along highway 401 and 80km/h on highway 115. If the total trip takes 2.5      Log On

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 Question 460975: the distance from brampton to peterborough is 240 km. Chris is able to drive at an average speed of 100km/h along highway 401 and 80km/h on highway 115. If the total trip takes 2.5h, how long does he drive alog highway 115?Found 2 solutions by rwm, htmentor:Answer by rwm(914)   (Show Source): You can put this solution on YOUR website!100*x+80*y=240 x+y=2.5 x=2 y=.5 half an hour on rte 115 Answer by htmentor(809)   (Show Source): You can put this solution on YOUR website!the distance from brampton to peterborough is 240 km. Chris is able to drive at an average speed of 100km/h along highway 401 and 80km/h on highway 115. If the total trip takes 2.5h, how long does he drive alog highway 115? =================================================================== Let t = the time traveled on highway 115 Since the total time is 2.5 h, the time traveled on highway 401 will be 2.5 - t Since distance = speed x time, we can write 240 km = 80 km/h *t + 100 km/h *(2.5-t) Simplify and solve for t: 240 = 80t + 250 - 100t 20t = 10 t = 0.5 h So the time traveled along highway 115 is 0.5 hours Check: 80*0.5 + 100*(2.5-0.5) = 40 + 200 = 240