Question

a sum of put at 11% per annum amounts to rs 12122 in two years 3 months what will it amount to in 3 years at the same rate

Answer 1

As we know : S.I = P × R × T/100

So, S.I. = 12122 × 11 × 3/100
             = 400026/100
             = 4000.26 RS
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Answer 2

given Amount = rs12122,
r = 11%  n = 2*12 =24+3=27 months
so, Amount = P + SI
     12122 = p  + pnr/100
     12122 = p + p * 27*11
                           -------------
                               12*100
12122 = p(1 + 292/1200)
12122 = P(1492 / 1200)
12122 = P *1.243
P = 12122 / 1.243
 P = 9752
 for 3 years  amount = p + si
                                   = 9752 + 9752*11*3/100
                                   =9752 +  3218.16
                                   =   Rs.12970.16