NCERT Exemplar IX — task. Science CBSE, Class 7.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Boojho walks to his school which is at a distance of $3\ km$ from his home in $30\ minutes$ . On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in $20\ minutes$ . His average speed in $km/h$ is

$7.2$
$8.3$
$3.6$
$5$

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29. NCERT Exemplar IX

Exercise condition: