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     EduGorilla 
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    Two school children A and B left their homes simultaneously for school at the same speed. Three minutes later, A remembered that he had forgotten to take his book and ran home at a speed exceeding the initial speed by 60 m/min. He collected the book and ran to school at the same speed and met his friend B, who was walking at a constant speed, at the school entrance. Find their initial speed if the school was 280 m from their homes.

    Options :-

    1. 60 m/min
    2. 45 m/min
    3. 40 m/min
    4. 30 m/min
    5. 50 m/min
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