In a concert hall, there are 18 chairs in the first row, and each row has 2 more chairs than the previous row. There are 15 rows altogether. How many chairs are there in the concert hall?

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asked Feb 10, 2022 61.3k views

12 votes

In a concert hall, there are 18 chairs

in the first row, and each row has
2 more chairs than the previous
row. There are 15 rows altogether.
How many chairs are there in the
concert hall?

Mathematics
high-school

Jianhong asked

by Jianhong

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1 Answer

8 votes

Answer:

you do 18+20+22+24+26+28+30+32+34+36+38+40+42+44+46

Explanation:

there are 480 chairs

Shivprasad Koirala answered Feb 15, 2022

by Shivprasad Koirala

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