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Man Crossing a Bridge

Author(s): 
A man is walking across a bridge at the rate of 4 mph, when a boat passes under the bridge immediately below him rowing 8 mph. The bridge is 20 feet above the boat. How rapidly are the boat and the pedestrian separating 5 minutes after the boat passes under the bridge? Byerly, Calculus 1895 Click here to reveal the answer

"Man Crossing a Bridge," Loci (February 2008)

Dummy View - NOT TO BE DELETED