Final answer:
The total number of people seated in the two sections of the concert hall is 274.
Step-by-step explanation:
To find the total number of people seated in the two sections of the concert hall, we need to find the total number of seats in each section and add them together. In the first section, there are 18 rows with 9 seats in each row, so the total number of seats is 18 rows * 9 seats/row = 162 seats. In the second section, there are 14 rows with 8 seats in each row, so the total number of seats is 14 rows * 8 seats/row = 112 seats. Therefore, the total number of people seated in both sections is 162 + 112 = 274 people.