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    Question

    A man invested certain sum at simple interest of r% p.a.

    such that it amounts to 130% of itself in 3 years. Find the interest earned when Rs. 3000 is invested at simple interest of r% p.a. for 3 years.
    A Rs. 920 Correct Answer Incorrect Answer
    B Rs. 930 Correct Answer Incorrect Answer
    C Rs. 900 Correct Answer Incorrect Answer
    D Rs. 910 Correct Answer Incorrect Answer

    Solution

    Let the sum invested be Rs. тАШPтАЩ Therefore, interest earned in 3 years = 1.3P тАУ P = Rs. 0.3P ATQ; 0.3P = (P ├Ч r ├Ч 3) ├╖ 100 Or, r = 30 ├╖ 3 Or, r = 10 So, required interest earned = (3000 ├Ч 10 ├Ч 3) ├╖ 100 = Rs. 900

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