simple interest on sum of money is 9/10 of the sum. if the rate is 9/2% per annum, find the time
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Let the principal ( p ) = Rs x
Simple interest ( I ) = 9x/16
Time = t
Rate of interest ( r ) = 9/2% per annum
t = ( 100 × I ) / ( pr )
= [ 100 × ( 9x/16 ) ]/ [ x × ( 9/2 ) ]
= ( 100 × 9x × 2 ) / ( x × 16 × 9 )
After cancellation ,
= 25/2
= 12.5 years
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