Answer:

Step-by-step explanation:
we know that
The area of a triangle is equal to


------->
------> equation A
where
b is the base of the triangle
h is the height of the triangle
In this problem the dimensions of the triangle are increased by a scale factor of 
so
the new dimensions of the triangle are

The new area of the triangle will be

------> equation B
Substitute equation A in equation B
![A1=18[48]=864\ ft^2](https://tex.z-dn.net/?f=A1%3D18%5B48%5D%3D864%5C%20ft%5E2)