KöMaL 2006 K71
The diameter of the wheels on Jack's bike is 28'' (inches), and the diameter of the wheels of Jill's bike is 14'' (inches). Jack's wheel turns around twice while he makes 3 turns on the pedals. Jill's wheels turns around 3 times while she makes two turns on the pedals. Jack turns the pedals twice as many times a minute as Jill does. Cycling at a uniform speed, Jill covers 2 kilometers in 20 minutes. How long does Jack take to cover the same distance?
Official text KöMaL. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
Similar problems
These problems have the most words in common with this statement.