Find rate of interest

Question

Ratio of principal and amount after a certain time period is 4 : 5 then after 2 years principal and amount ratio becomes 5 : 7. Then find the rate of interest per annum.

 

solved 0
SSC & Banking Shweta Gupta 3 months 1 Answer 59 views 0

Answer ( 1 )

  1. P/A = 4/5
    A= P + I
    P/I = 4/1

    P*100/ PRT = 4/1
    100/RT = 4/1
    T = 25/R                                ———————————- Eq. 1

    Now, After (T+2) Years
    P/A = 5/7
    P/I = 5/2
    P*100/ PR(T+2) = 5/2
    R(T+2) = 40
    Put T from Eq. 1
    25 + 2R = 40
    2R= 15
    R = 7.5 % Per Annum

    Best answer

Leave an answer

Browse