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 Solution Rajeev deposited money in the post office which is doubled in 20 years at a simple rate of interest. In how many years will the original sum triple itself ?Solution:Your problem -> Rajeev deposited money in the post office which is doubled in 20 years at a simple rate of interest. In how many years will the original sum triple itself ?Let, Sum = X, Time = 20 years and Amount = 2X. :. SI = X. SI = (P*R*N)/100R = (SI * 100)/(P * N) = (X * 100)/( X * 20 ) = 5 % :. sum of money double at 5 % in 20 years. Solution provided by AtoZmath.com Any wrong solution, solution improvement, feedback then Submit Here Want to know about AtoZmath.com and me