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    Question

    You have a budget of Rs. 4000 and would like to purchase LPG cylinders from a local seller who charges Rs. 50 per cylinder. The seller has a subsidy scheme by which if you return the empty cylinder purchased from him, you will get a refund of Rs. 20 per cylinder. You cannot borrow money from anyone. The maximum number of cylinders you can purchase is

    A 131 Correct Answer Incorrect Answer
    B 132 Correct Answer Incorrect Answer
    C 133 Correct Answer Incorrect Answer
    D 134 Correct Answer Incorrect Answer

    Solution

    1st cylinder = Rs.50, and after that we can have each cylinder of Rs. 30 (We can return the old one). That is 50 + 30x <= 4000 X<=131.67 X= 131 Since X is for remaining cylinders, but we also bought 1st cylinder, hence total cylinders = 132.

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