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    Question

    Rs. (n + 400) invested on simple interest amounts to Rs.

    3,200 and Rs. 3,800 in 4 years and 6 years, respectively. Find the value of 'n'.
    A 1000 Correct Answer Incorrect Answer
    B 1600 Correct Answer Incorrect Answer
    C 1240 Correct Answer Incorrect Answer
    D 1150 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Interest earned in 2 years = 3,800 - 3,200 = Rs. 600
    Interest earned in 1 year = 600 ├╖ 2 = Rs. 300
    Interest earned in 4 years = 300 ├Ч 4 = Rs. 1,200
    So, n + 400 = 3,200 - 1,200
    Or, n + 400 = 2,000
    Or, n = 1,600

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