Answer:
240 square meters
Step-by-step explanation:
The area of the base is the area of a square 10 m on a side:
base area = (10 m)^2 = 100 m^2
The lateral area is the area of 4 triangles, each of which is ...
triangle area = (1/2)bh = (1/2)(10 m)(7 m) = 35 m^2
So the total area is ...
base area + 4 · triangle area = total area = 100 m^2 + 4·35 m^2 = 240 m^2
