Find the perimeter of a parallelogram of a length 40cm and width 28 cm.

Answer

To find the perimeter of a parallelogram with a length of 40 cm and a width of 28 cm, we can follow these steps:

### Step 1: Understand the formula for the perimeter of a parallelogram.
The formula for the perimeter (P) of a parallelogram is given by:
\[ P = 2 \times ( \text{length} + \text{width} ) \]

### Step 2: Identify the given dimensions.
From the question, we have:
- Length (L) = 40 cm
- Width (W) = 28 cm

### Step 3: Substitute the values into the formula.
Now, we will substitute the values of length and width into the perimeter formula:
\[ P = 2 \times (40 \, \text{cm} + 28 \, \text{cm}) \]

### Step 4: Calculate the sum of length and width.
First, we need to calculate the sum of the length and width:
\[ 40 \, \text{cm} + 28 \, \text{cm} = 68 \, \text{cm} \]

### Step 5: Multiply the sum by 2.
Now, we will multiply the sum by 2 to find the perimeter:
\[ P = 2 \times 68 \, \text{cm} = 136 \, \text{cm} \]

### Final Answer:
The perimeter of the parallelogram is **136 cm**.

---