Question

Q 16 A school has 8 periods of 2 points
45 minutes duration. What will
be the duration of each period
if no of periods is increased by
one ,assuming the number of
working hours to be the same
? ​

Answer 1

Answer:

The duration of period is 40 minutes.

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.

∴8×45=9×x

⇒x=  

9

8×45

​  

=40

Hence, the duration of period is 40 minutes.

Answer 2

Answer:

40 mins

hope this may help you