MathematicsWhat is the rate of interest, if there is a difference of Rs. 121.50121.50 between the simple interest and the compound interest on principle of Rs. 15,00015,000 for 22 years.compound epithelium.

What is the rate of interest, if there is a difference of Rs. 121.50121.50 between the simple interest and the compound interest on principle of Rs. 15,00015,000 for 22 years.

compound epithelium.

  1. A
    4%
  2. B
    6%
  3. C
    9%
  4. D
    8% 

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    Solution:

    The principal amount in Rs.,
    Time in years is, The simple interest is given by,
     The compound interest is given by,
     P= Principal amount,
    r= Rate of interest
    t= Time in years.
    The difference D of simple interest and compound interest is given Rs.121.5
     Substituting the value of Difference, D=121.5, Principal P=15,000 and Time,t=2 in


    The LCM of 1000010000,11 and 100100 is 10000
     
    Using the identity , here a=100 and b=r


    The value of is calculated
    Taking the square root

    Hence, the value of rate of interest is, So, option 3 is correct.
     
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