Question
Find the rate of interest per annum? Statement I . The
CI in 12 years is more than the amount. Statement II . The difference between SI and CI in 3 years is Rs.1200 Statement III . An amount double itself at SI in 20 years In each of the following questions, a question and some statements are given. You have to decide whether the date given in the statements is sufficient to answer the question or not.Solution
From statement III: Principal = P, Amount = 2P Interest = 2P – P = P SI =P = P × R × 20/100 
 Rate = 5 %
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