Question

1) There is an auditorium with 27 rows of seats .There is 20 seats in 15 rows, 22
seats in second row 24 seats in the 3rd Row and so on. Find the number of seats
in the 15th row and also find how many total seats are there in the auditorium​

Answer 1

Answer:

垫

我仍然躲在大地

什么样的形式

形成

爪子

47 \时间447×4

同样，还有