A rectangle has a width of 9 km and a length of 6 km. How does the area change when each dimension is multiplied by 3?
For this case we have that by definition the area of a rectangle is given by:
\(A = wl\)
Where
The area of the original rectangle is given by:
\(A1 = (9) (6)\\A1 = 54\)
The area of the new rectangle is given by:
\(A2 = (3 * 9) (3 * 6)\\A2 = 9 * (9) (6)\\A2 = 9 * 54\\A2 = 9 * A1\)
Therefore, the original area increases with a factor of 9.
Anwer:
the original area increases by a factor of 9.
\(A2 = 9 * A1\)