Problem
Given a rectangle with a length of 10 units and a width of 5 units, what is the perimeter of the rectangle?
Solution
Step 1 ：Step 1: Recall the formula for the perimeter of a rectangle which is \( P = 2l + 2w \) where \( l \) is the length and \( w \) is the width.
Step 2 ：Step 2: Substitute the given values into the formula. That is, \( l = 10 \) units and \( w = 5 \) units.
Step 3 ：Step 3: Solve for \( P \). This gives \( P = 2(10) + 2(5) = 20 + 10 = 30 \) units.
