Question

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

Answer 1

Hey Mate

Here is your answer

We can solve this question in proportion method

= 9 : 50 :: X : 45
= 45 x 9. :: 50 X
X = 45 x 9 ÷ 50
X = 8.1

Ans : 8 periods


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Answer 2

Answer: 10 periods

Explanation:

Total no. of periods = 9

Duration of each period = 50 mins

So, duration of 9 periods = 50*9

                                           = 450 mins

Duration of each period if decreased by 5 mins = 50 - 5

                                                                                   = 45 mins

So, total no. of periods in 450 mins = 450/45

                                                              = 10 periods