Question

a school has 8 periods in a day each of 45 minutes duration. how long would each period be if the school has 9 periods in a day? how many periods can be there if each is of the duration of 36 minutes??`

Answer 1

Answer:

it would be of exactly 30 minutes.

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Answer 2

Answer:

Step-by-step explanation:

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.

Therefore

8 * 45 = 9 * x

So x = 8 * 45 /9

=40 minutes