Question

a volunteer has to arrange as many chairs as the no. of guests in an auditorium in such a way that the no. of rows was equal to the no. of chairs in each row. There were 39 chairs in each row. Out of the total seats 21 were left unoccupied. How many guests came to the function.​

Answer 1

Answer:

Step-by-step explanation:

The number of chairs in each row = The number of rows

Consider no. of rows as height and number of chairs in each row as width, so

This means that it is like a square.

So, Total chairs = 39

If we find the sq root of

we get a number = 6.24... (something in decimals) 

So, we find the next nearest natural number to 6.24, i.e. 6.5

So, 6.5² = 39

We have total 39 chairs

Empty chairs = 21

 THEREFORE, 18 guests came to the function.

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