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     EduGorilla 
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    A training plane flies along the four sides of a rectangle at the speeds of 400, 400, 1200 and 800 km/h, starting from the longer side. The length and breadth of the rectangle are in the ratio 2 : 1. Find the average speed of the plane around the field.

    Options :-

    1. 824 km/hr
    2. 748 km/hr
    3. 576 km/hr
    4. 816 km/hr
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