Question

The life expectancy of a circulating coin is 25 years. The life expectancy of a circulating dollar bill is only 1/20 as long. Find the life expectancy of circulating paper money

Answer 1

This problem can be solved easily by multiplying the time of the life expectancy of the coin with the fraction 1/20. The solution is as follows:

Life expectancy of circulating paper money = 25 years * 1/20
Life expectancy of circulating paper money = 1.25 years or 1 and 1/4 years