Answer:
250m^2
Step-by-step explanation:
To find the surface are we need to add the area of the faces. The rectangle face has side lengths of 10 and 5, so its area is 50. There are 4 rectangle faces, so they have a combined area of 200. The square face has an edge length of 5, making its area 25. There are 2 square faces, so they have a combined area of 50. 200+50 is 250
