Multiple Choice Questions on If Rs 7200 amounts to Rs 10368 at compound interest in a certain time then Rs 7200 amounts to what i........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

If Rs 7200 amounts to Rs 10368 at compound interest in a certain time then Rs 7200 amounts to what i...........

Quantitative Aptitude ( CCS) Compound Interest
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    If Rs. 7200 amounts to Rs.10368 at compound interest in a certain time , then Rs. 7200 amounts to what in half of the time?

    8640

    Correct Answer

    8600

    Incorrect Answer

    8800

    Incorrect Answer

    8520

    Incorrect Answer
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    Explanation:

    Let rate = R% and time = n year
    Then, 10368 =7200(1+R/100)n
    ⇒ (1+R/100)n = 10368/7200 = 1.44
    ∴ (1 + R/100)n/2 = √1.44 = 1.2
    ∴ Required amount for n/2 yr
    = 7200(1+ R/100)n/2
    = 7200 x 1.2 = Rs. 8640

    By: Pranav Gupta
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