Mathematics · Simple and Compound Interest
Rohit invests Rs. X in a compound interest scheme at an annual interest rate of r% per annum (compounded annually) for 1 year. At the same time, Pooja invests Rs. 2X in a simple interest scheme at an annual rate of 4r% for 1 year. If the ratio of the total amount received by Rohit (including principal and interest) to the simple interest earned by Pooja is 5:8, what is the value of r?
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