Answer:
294 m²
Explanation:
You want the lateral area of a regular hexagonal prism with side lengths 7 m and height 7 m.
Lateral area
The lateral area is the sum of the areas of the 6 square faces.
Each of the 6 faces is a square 7 m on the edge. Its area is ...
(7 m)² = 49 m²
There are 6 of these square faces, so their total area is ...
6 × 49 m² = 294 m²
The lateral area of the prism is 294 m².