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A rectangular box is 5 cm long. 3 cm wide and 4 cm high. Find its surface area.

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ForestGreen

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:

SA = 2 (WL + HL + HW)

where:

  • W = Width
  • H = Height
  • L = Length

Solution:

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

Answer:

The surface area of a rectangular box of 5 cm long, 3 cm wide and 4 cm wide is 94 cm².

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