Answer:
Surface area:
Step-by-step explanation:
(Imagine there's line separating the rectangle and square)
Rectangle
l × w × h
3 cm × 13 cm × 3 cm
117 cm^3
Square
l × w × h
5 cm × 2 cm × 3 cm
30 cm^3
Total Area
117 cm^3 × 30 cm^3
3,510 cm^3
Hope this is enough of an "explanation." Glad I could help though!
