SOLUTION: Helen takes public transportation to and from work each day. The blue line bus stops at State Street and Main every twenty minutes. The red line bus stopes there every half hour.

Question 481982: Helen takes public transportation to and from work each day. The blue line bus stops at State Street and Main every twenty minutes. The red line bus stopes there every half hour. If both buses were at the stop at 1:10pm what is the next time that Helen will be able to change buses at the State Street stop without waiting?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
At 1 hour from 1:10, the blue line bus has made it's 3rd stop
At Helen's stop, since
At 1 hour from 1:10, the red line bus has made it's 2nd stop
At her stop, since
So 1:10 + 1 = 2:10 is the next time that Helen can get off 1 bus
and get on the other one
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