Question
The simple interest on a sum of money is 9/20 of the
sum. If the number of years is numerically half the rate per annum, then find the rate percent per annum.Solution
Let P = 20 units and Simple Interest = 9 units T = R/2 SI = (P × R × T)/100 => 9 = (20 × R × R)/(100 × 2) => R = 9.5%
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