Question

a school had 9 periods a day each of 50 minutes duration. how many periods will there be, if the duration of every period is reduced by 5 minutes?​

Answer 1

Answer:

Presents duration each period = (50 - 5) minutes = 45 minutes.

Let the present number of period be ‘x’.

Since, more the number of periods, less is the duration of a period.

∴ It is a case of inverse variation.

We have:

Number of periods

Diuration of each period (in minutes)

9

50

X

45

Presents duration each period = (50 - 5) minutes = 45 minutes.

Let th

Answer 2

Step-by-step explanation:

Presents duration each period = (50 - 5) minutes

= 45 minutes.

Let the present number of period be 'x'.

Since, more the number of periods, less is the duration of a period.

: It is a case of inverse variation.

We have:

Number of periods 9

Diuration of each period (in minutes)

50

45

9 x 50 = x X 45

X =9 x 50

45

Thus, the required number of periods =10.1

= 10