A forest ranger in a 140-foot observation tower sees a fire moving in a direct path toward a lake

140-foot-observation

#1

A forest ranger in a 140-foot observation tower sees a fire moving in a direct path toward a lake. The angle of depression to the fire is 3 degrees and the angle of depression to the lake is 8 degrees. To the nearest foot, how close is the fire to the lake?

Answer:

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