SOLUTION: It takes Al 1 min,Betty 2 min,Carla 5 min and Dan 10 minutes to walk over a bridge at night. There is only one flashlight enough for two people to see when crossing. After each pai

SOLUTION: It takes Al 1 min,Betty 2 min,Carla 5 min and Dan 10 minutes to walk over a bridge at night. There is only one flashlight enough for two people to see when crossing. After each pai

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Question 135347: It takes Al 1 min,Betty 2 min,Carla 5 min and Dan 10 minutes to walk over a bridge at night. There is only one flashlight enough for two people to see when crossing. After each pair crosses someone has to get the light back to the others so they can cross. What is the fastest time to get all four of them across the bridge.
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
2+1+5+1+10=19 min.
Al crosses 5 times.
.
Ed
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