A firefighting crew uses a water cannon that shoots water at 28.0 m/s at a fixed angle of 50.0 ^{} above the horizontal. The firefighters want to direct the water at a blaze that is 13.0 m above ground level.

How far from the building should they position their cannon? There are *two* possibilities (d_{1}<d_{2}); can you get them both? (Hint: Start with a sketch showing the trajectory of the water.)

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