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    Question

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

    such that it amounts to 150% of itself in 5 years. Find the interest earned when Rs. 2200 is invested at simple interest of r% p.a. for 3 years.
    A Rs. 650 Correct Answer Incorrect Answer
    B Rs. 620 Correct Answer Incorrect Answer
    C Rs. 660 Correct Answer Incorrect Answer
    D Rs. 630 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the sum invested be Rs. тАШPтАЩ Therefore, interest earned in 5 years = 1.5P тАУ P = Rs. 0.5P ATQ; 0.5P = (P ├Ч r ├Ч 5) ├╖ 100 Or, r = 50 ├╖ 5 Or, r = 10 So, required interest earned = (2200 ├Ч 10 ├Ч 3) ├╖ 100 = Rs. 660

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