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     EduGorilla 
    Keymaster

    X, Y and Z can do a piece of work in 30,40 and 50 days respectively. All three of them began the work together but Y left 4 days before completion of the work. In how many days was the work completed?
    X, Y और Z किसी कार्य को क्रमश: 30, 40 और 50 दिनों में कर सकते हैं। तीनों एक साथ कार्य को आरम्भ करते हैं लेकिन Y कार्य के पूरा होने से 4 दिन पहले कार्य छोड़ देता है। तो कार्य कितने दिनों में पूरा होता है? 

    Options :-

    1. 660/47 

    2. 640/47 

    3. 680/47 

    4. 665/47 

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