Question

A school has 8 periods a day each of 45 minutes duration . How long would each periods a day, assuming the number of school hours to be the same ​

Answer 1

Answer:

Let x minutes be the duration of period when the school has 9 periods a day. Then

Number of periods 8 9

Duration of periods (in minutes) 45 x

Clearly, more the periods, less will be the duration of the period.

So, it is a case of inverse proportion.

∴ 8 × 45 = 9 × x

⇒ x = (8 × 45) ÷ 9

= 40

Hence, the duration of period is 40 minutes.

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Answer 2

Answer:

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