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[中小學校]中2數學1問

發問:

Tim can answer 8 multiple choice questions in 10 min and 2 long questions in 25 min.If there are 45 multiple choice questions and 5 long questions in an exam paper,can he finish the whole paper in 2 hours?(呢題係教 比和率) 更新: 以上問題比埋步驟(唔該)

最佳解答:

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8 multiple choice questions in 10 min = 1.25 min / q The time needed for doing 45 multiple choice questions: 1.25 × 45 min / 1 × 45 q = 56.25 min / 45 q 2 long questions in 25 min = 12.5 min / q The time needed for doing 5 long questions: 12.5 × 5 min / 1 × 5 q = 62.5 min / 5 q The total time = 56.25 + 62.5 = 118.75 min
其他解答:

As follows: 圖片參考:http://a.imagehost.org/0411/ScreenHunter_05_Nov_15_12_07.gif|||||*89465165156498

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