Find the total number of cells in an area model of 4 rows and 5 columns.
Soldiers are standing in an assembly line in such a way that number of rows is equal to number of columns. If total number of student is 144. The number of rows and columns are:
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: