Question

(iii) There are 25 rows of seats in an auditorium. The 1st row is of 20 seats, the 2nd
row of 22 seats, the 3rd row of 24 seats and so on. How many seats are there
in the 21st row?​

Answer 1

Answer:1048601

Step-by-step explanation:

in 1st row = 25 + 2^0

in 2nd row =25 + 2^1

in nth row = 25 + 2^n-1

Answer 2

the answer is 60 seats

here we can use the arithmatic progression in which

a:-20

d:-2

n:-21