Today is 22 November 2014, the 326th day of the year.
 

 

 



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Sally Simplewit and her friend Betty Highbrain both love the outdoors. Sally likes kayaking, while Beth prefers hiking, and it happens that Sally paddles her kayak at exactly the same speed that Beth hikes. One morning they decide to go a mile upstream from their campsite, Sally on the water and Beth on foot. They set off at the same time, both going exactly a mile and then coming straight back. However, on the way upstream the speed of the stream is working against Sally, while on the way downstream it is working for her.
Today's challenge: Who gets back to the campsite first?

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