Question

at what rate of simple interest per annum.will the intetest be half of the principal in 5 years?

Answer 1

let the principal be P
now, a/q,
interest= P/2
            =(P×R×T)/100
       ⇒P/2= (P×R×5)/100
         solving, we get,
 R= 10% per annum

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