Answer:
35 square feet
Step-by-step explanation:
Surface Area is the area of all the surface. Each surface is a rectangle with area:
Area = length * width
There is no "TOP", so there will be total of 5 faces. We find areas of all 5 faces and SUM IT.
Bottom Area = 3 * 1 = 3
Front Area = 3 * 4 = 12
Back Area = 3 * 4 = 12
Left Area = 4 * 1 = 4
Right Area = 4 * 1 = 4
Total Surface Area = 3 + 12 + 12 + 4 + 4 = 35
Surface Area = 35 square feet
