It will take about 10,560 years for Niagra Falls to eroid away.Here are the steps I used to figure it out.1.With a string measure how long it is from Horshoe Falls to Lake Erie.2.Measure the string.3.Use map scale to find out how many miles your measurment represents.4.Caculate the number of years it will take to eroid away Niagra Falls.
KT
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