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    Question

    Ravi invests Rs. 'x' in scheme X and Rs. (x + 600) in

    scheme Y for 4 years each. Schemes X and Y offer simple interest at 12% p.a. and 8% p.a. respectively. If the total interest earned is Rs. 2,720, find the value of 'x'.
    A 2520 Correct Answer Incorrect Answer
    B 3350 Correct Answer Incorrect Answer
    C 1560 Correct Answer Incorrect Answer
    D 3160 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Simple interest = Principal ├Ч Rate ├Ч Time ├╖ 100

    ATQ,

    x ├Ч 12 ├Ч 4 ├╖ 100 + (x + 600) ├Ч 8 ├Ч 4 ├╖ 100 = 2,720

    тЖТ 0.48x + 0.32x + 192 = 2720

    тЖТ 0.8x = 2720 - 192 = 2528

    тЖТ x = 2528 ├╖ 0.8 = 3160

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