Question 25
When I cycled around the lake yesterday, my children Sally and Wally decided to ride the same route in the opposite direction. We all set off at the same time, from the same point, and finished at that same spot. We each rode at our own steady speed. It took me 77 minutes. Sally and I passed each other, waving, exactly 42 minutes after we started. Precisely 2 minutes later, Wally and I passed each other, puffing. To the nearest minute, how much longer did Wally take than Sally to ride around the lake?