GEORGE LENCHNER PDF

A fenced rectangular garden is 10 meters wide and 20 meters long. When one side is moved outward and two other sides are increased in length, the area increases by 40 square meters. What is the fewest number of meters of additional fencing needed to form the larger rectangular garden? George Lenchner, a nationally prominent mathematics educator whose work gave rise to interscholastic math leagues throughout the country, and who believed that with the right preparation, a seventh or eighth grader could solve the problem above in six minutes or less, died on April 23 in San Francisco.

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