In an auditorium, seats were arranged in rows and columns. The number of rows was equal to the number of seats in each row. When the number of rows was doubled and number of seats in each row was reduced by 10, the total number of seats increased by 300. Find:
In an auditorium. seats were arranged in rows and columus. The number of rows was equal to the number of seats in each row. When the number of rows was doubled and the number of seats increased by 300. Find :
(i) the number of rows in the original arrangement.
(ii) the number of seats in the auditorium after re-arrangement.