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Chairs in a hall is arranged in 35rows and 18 columns

a) how many would there be with21 chairs to a row?
b) how many chairs would there be in each row if there were 15 rows?


The Brainliest Answer!
Totally there are 630 chairs. each row consists if 18 chairs.
a) If there are 21 chairs in the row then total chairs are 630+18×3=684 chairs.
b) If there are 15 rows then total chairs are 15×18=270 chairs..
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