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a boy runs for 10 min …

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a boy runs for 10 min at a  uniform speed of 9km/h . at what speed should he run for the next 20 min.so that the average speed comes to 12km/h?

    • Posted by Sai Poreddiwar 7 years ago

    CBSE > Class 09 > Science
    • 1 answers

    Md Wasim 7 years ago

    6km/h

    0Thank You

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