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Question

Question 11.
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 to be the same?

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Solution

Let the duration of each period be x
Period89Duration of period (in minutes)45x
Here the number of periods and the duration of periods are in inverse proportion.

89=x45 x×9=8×45 x=8×459=40 minutes
Hence, the duration of each period would be 40 minutes.

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