A piece of string is 30 cm long. What will be the length of each side if the string is used to form :
a square ?

Answer

To find the length of each side of a square formed by a piece of string that is 30 cm long, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Problem**: We have a piece of string that is 30 cm long, and we want to use this string to form a square. The length of the string represents the perimeter of the square.

**Hint**: Remember that the perimeter of a shape is the total distance around it.

2. **Formula for Perimeter of a Square**: The formula for the perimeter (P) of a square is given by:
\[ P = 4 \times \text{side} \]
where "side" is the length of one side of the square.

**Hint**: The perimeter of a square is four times the length of one side.

3. **Set Up the Equation**: Since the length of the string is equal to the perimeter of the square, we can write:
\[ 30 \, \text{cm} = 4 \times \text{side} \]

**Hint**: Substitute the value of the perimeter into the formula.

4. **Solve for the Side Length**: To find the length of each side, we need to isolate "side" in the equation. We do this by dividing both sides of the equation by 4:
\[ \text{side} = \frac{30 \, \text{cm}}{4} \]

**Hint**: When you divide, make sure to simplify the fraction properly.

5. **Calculate the Length of Each Side**: Now, perform the division:
\[ \text{side} = 7.5 \, \text{cm} \]

**Hint**: Double-check your division to ensure accuracy.

### Final Answer:
The length of each side of the square is **7.5 cm**.