The admin department of the school has purchased 378 chairs for arranging
them in the auditorium. The chairs are to be arranged in rectangular manner
(number of rows × number of columns).
a. If number of columns is 18, how many rows will be there?
But the Principal has now asked to arrange the chairs such that the number of rows
is always equal to the number of columns.
Answers
Answer:
hope it is helpful
Given : 378 chairs for arranging in the auditorium.
chairs are to be arranged in rectangular manner
(number of rows × number of columns).
To Find: If number of columns is 18, how many rows will be there?
if arranged in square how many chairs will be left out or how many more chairs be needed
Solution:
Total Number of chairs = number of rows × number of columns
Total Number of chairs = 378
Number of columns = 18
=> 378 = number of rows × 18
=> 21 = number of rows
Hence number of rows will be 21
Arranged in square
19
1 378
1
____
29 278
261
____
17
378 = 19 * 19 + 17
17 Chairs will be left out and 19 chairs will be in each row and column
or 20 * 20 - 378 = 22 chairs will be needed more
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