Question

For sitting arrangement of the participants in the hall how many chairs are needed in each row such that the number of rows is a perfect square number
There are 90 participants​

Answer 1

Answer:

10 chairs are needed for each row

Step-by-step explanation:

Number of chairs needge in each row =  Total no. of participants/Total no. of

                                                                   rows            

We know, Total no. of Participants = 90 (given)

Total no. of rows = is a perfect square = perfect square number which is divisible by 90(no. of participants) = $3^{2}$ = 9 ( $3^{2}$ = 9 is the only perfect square number which is divisible by 90)

∴ Number of chairs needge in each row =  Total no. of participants/Total no.

                                                                        rows

                                                                    = 90/9

                                                                    = 10

Hence, 10 is the number of chair needed in each row.

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