The problem states that a rectangular board has a long side of 18 cm and a short side of 12 cm. We need to find the perimeter of the board.

1. Problem Description

The problem states that a rectangular board has a long side of 18 cm and a short side of 12 cm. We need to find the perimeter of the board.

2. Solution Steps

The perimeter of a rectangle is given by the formula:

$P = 2 * (length + width)$

In this case, the length is 18 cm and the width is 12 cm.

Substituting these values into the formula, we have:

$P = 2 * (18 + 12)$

$P = 2 * (30)$

$P = 60$

3. Final Answer

The perimeter of the board is 60 cm.