Multiple Choice Questions on A certain sum is lent for 3yrs at 10 compound interest p a if the C I for the 3rd year is 242 Then w........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A certain sum is lent for 3yrs at 10 compound interest p a if the C I for the 3rd year is 242 Then w...........

Quantitative Aptitude ( CCS) Compound Interest
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    A certain sum is lent for 3yrs at 10% compound interest p.a. if the C.I for the 3rd year is 242. Then what will be the S.I for 4yrs?

    400

    Incorrect Answer

    800

    Correct Answer

    600

    Incorrect Answer

    1000

    Incorrect Answer
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    Explanation:

    R – 10% = 1/10 ….. (10)³ = 1000, let P=1000
    .                      1000
    100……………..100…………….100
    .                       10……………….10
    .                                              10
    .                                                1
    C.I for 3rd yr = 121
    121 = 242
    1 = 2
    P = 1000 = 2000
    S.I = 4*10 = 40% of 2000 = rs800

    Hence, option 2 is the correct answer.

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