October 2018 1 86 Report
Seorang anak telat bngun pagi dan ktingglan bus ia terpaksa berlari2 ke skolah. ia berlari 500 m kearah utara. kmudian 800 m kearah timur.jika waktu yng dibutukan 900 s, berapa kecepatan rata2 dan kelajuan anak tersebut??

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