Final answer:
The surface area of a rectangular prism with dimensions 5 cm (length), 4 cm (width), and 3 cm (height) is calculated using the formula: SA = 2lw + 2lh + 2wh. After substituting the values, the total surface area is found to be 94 cm².
Step-by-step explanation:
To find the surface area of a rectangular prism with the dimensions Length: 5 cm, Width: 4 cm, and Height: 3 cm, we use the formula for the surface area of a rectangular prism, which is SA = 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height.
By plugging in the values, we get:
SA = 2(5 cm)(4 cm) + 2(5 cm)(3 cm) + 2(4 cm)(3 cm)
SA = 2(20 cm²) + 2(15 cm²) + 2(12 cm²)
SA = 40 cm² + 30 cm² + 24 cm²
SA = 94 cm²
This means the surface area of the object is 94 cm².