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     EduGorilla 
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    A boat covers 12 km. upstream and 18 km downstream in 3 hours while it covers 36 km upstream and 24 km downstream in 13/2 hours, what is the velocity of the stream?

    Options :-

    1. 1.5 km/hr
    2. 8 km/hr
    3. 2 km/hr
    4. 4.5 km/hr
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