Surface area of the cube #1 = 6a².
If the length of each edge of the cube is tripled, then
surface area of the cube #2 = 6(3a)²= (6*a²)*9 =
= (surface area of the cube #1)*9
surface area of the cube #2 = (surface area of the cube #1)*9 = 600*9 =
= 5400 m²
Answer: the new surface area of the cube = 5400m²