Question

A concert hall has 12 seats in the first row, 14 seats in the second row, 16 seats in the third row, and so on. If the pattern continues, how many seats are in the first 12 rows? 340 seats 276 seats 168 seats 144 seats

Answer 1

276 seats

Step-by-step explanation:

If a concert hall has 12 seats in the first row, 14 seats in the second row, 16 seats in the third row and the pattern continues, each row will have 2 more seats than the previous row. So, the number of seats in each row from the first to the 12th row are:

12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, and 34

Then, the number of seats un the first 12 rows are:

12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 + 28 + 30 + 32 + 34 = 276

Therefore, the answer is 276 seats.