The simple interest on a sum of money is 8/25 of the sum. If the number of years is numerically half the rate per annum, then find the rate percent per annum.
Let P = 25 units and Simple Interest = 8 units T = R/2 SI = (P × R × T)/100 => 8 = (25 × R × R)/(100 × 2) => R = 8%
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