To get the surface area of the rectangular box 5 cm long, 3 cm wide and 4 cm high, we will use the Surface Area formula of rectangular box. The Surface Area formula to be used is expressed below:
- W = Width
- H = Height
- L = Length
Step 1: Before solving, let's list down the given.
- L = 5 cm
- W = 3 cm
- H = 4 cm
Step 2: Let's use the given to substitute on the formula:
SA = 2 (WL + HL + HW)
SA = 2 ((3 cm x 5 cm) + (4 cm x 5 cm) + (4 cm x 3 cm))
SA = 2 (15 cm² + 20 cm² + 12 cm²)
SA = 2 (47 cm²)
SA = 94 cm²
The surface area of a rectangular box of 5 cm long, 3 cm wide and 4 cm wide is 94 cm².