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A Scale for the Solar System

The Earth is further from the Sun than Venus, but how much further? Twice as far? Ten times?


Swimmers in opposite directions cross at 20m and at 30m from each end of a swimming pool. How long is the pool ?

On the Road

Age 14 to 16
Challenge Level

The notes for the problem Four on the Road give a suggested approach for this problem.
Use of graphing software or graphical calculators to draw graphs representing the given information can give a lot of insight into what changes and what stays the same when the freedoms of the problem are explored.