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     EduGorilla 
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    A motor boat goes 12 km upstream and back again to the starting point in 40 minutes and 30 seconds. If the speed of the stream is 4 km/hr, then find the speed of the motorboat in downstream.

    Options :-

    1. 36 km/hr

    2. 40 km/hr

    3. 32 km/hr

    4. 28 km/hr

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