WT Cheng's answer to stiles's Secondary 1 Maths Singapore question.
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Hi Erika,
1) Based on LCM of 36 & 48 = 144, the 2 bells ring together every 144 mins or 2hrs 24mins.
2) As the lesson time for each school is the same and lasts for 6hrs 20mins, 3) Both bells will ring together twice every 144mins (2hrs 24mins) before school dismissal. Hence they will ring together one final time 288mins (4hrs 48mins) after the lesson starting time at 0740, at 1228.
1) Based on LCM of 36 & 48 = 144, the 2 bells ring together every 144 mins or 2hrs 24mins.
2) As the lesson time for each school is the same and lasts for 6hrs 20mins, 3) Both bells will ring together twice every 144mins (2hrs 24mins) before school dismissal. Hence they will ring together one final time 288mins (4hrs 48mins) after the lesson starting time at 0740, at 1228.
Date Posted:
3 years ago
ohh thankyouu !!
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