A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours tobe the same?


A school has 8 periods a day each of 45 minutes duration.

Total time = 8 × 45 minutes


if the school has 9 periods a day.


Then duration of period = (8 × 45)/ 9


= 40 minutes


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