Question

on a certain sum and on a certain rate percent ,the S.I.for first year is Rs. 270 and the C.I. for the first two years is Rs. 580.50.Find the sum and rate percent.

Answer 1

I hope  u Would Have Noticed That CI and SI for  the First Year are same Therefore
CI for the First Year = 270
So CI for the second year = 580.50 -  270.00 = 310.50
So Applying the formula
Rate = ( CI for the Second Year - CI for the First Year) * 100
           ___________________________________________
                               CI for the First Year
[Note: This Formula Only is Applicable For consecutive years]

So now
Rate =(310.50 - 270)*100
         ---------------------------
                     270
Rate =40.50 * 100
           ---------------
                 270

Rate =4050
           -------
             270

Rate = 15%

So now,
SI = PRT
       -------
       100
270=P*15*1
       -----------
         100
P = 270 * 100
       ------------
         15 * 1
P = 27000
     -----------
          15

P = Rs 1800

I have Verified The Answer But if u Still think its wrong u can verify yourself

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Hope u Understood
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