Question

if principle - 10000, rate of interest - 4.5 percent and N - 2 years find the difference between CI and SI

Answer 1

A = P(1+r/100)^n
A = 10000(1+9/100*2)^2
A = 10000×209×209/200×200 = 209×209/4 = 10920.25₹
SO, CI = A-P = 10920.25-10000 = 920.25₹
NOW SI = PRT/100 =10000×9×2/100×2 = 50×18 = 900₹
Difference b/w CI and SI = 920.25-900 = 20.25₹

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Answer 2

THE ANSWER IS 20.25 Rs

SI = PRT/100
    = 10000*45*2/1000
    = 900
CI = 1000*(1+(45/1000))²-1)
    = 1000*92025/1000000
    = 92025/100
    = 920.25
Difference = 920.25=900
                   = 20.25 Rs
Hence, the difference b/w CI and Si is Rs. 20.25