Six young people, Anna and Annika, Brooke and Breanna, Chloe and Claire, must make the 10 km trip back home with only their 4 seater car to carry them. Each of the six can drive at a steady 45 km an hour carrying three of the others but the remaining two must travel on foot. Fortunately, Anna and Annika can each run at 15 km an hour, Brooke and Breanna can both jog at a brisk 9 km an hour, and Chloe and Claire will happily walk at 5 km an hour. By cleverly combining their resources, they have worked out how they can reach their destination in the minimum possible time. How many minutes is that?
I started answering this question and now an stuck.
They start off with 4 people aboard, while Breanne and Brooke jog at 9 km an hour. The car then drops off Anna and Annika who run at 15 km an hour and returns to pick them up en route, Now their is four aboard again. This way, all four arrive at home at the same time .
Any ideas on how to figure out how many minutes would be the fastest?
I started answering this question and now an stuck.
They start off with 4 people aboard, while Breanne and Brooke jog at 9 km an hour. The car then drops off Anna and Annika who run at 15 km an hour and returns to pick them up en route, Now their is four aboard again. This way, all four arrive at home at the same time .
Any ideas on how to figure out how many minutes would be the fastest?