Room temmerature is often taken to be `68^(@)`F, what will it be on Celsius scale?

Answer

To convert the temperature from Fahrenheit to Celsius, we can use the formula:

\[ C = \frac{5}{9} (F - 32) \]

Where:
- \( C \) is the temperature in Celsius,
- \( F \) is the temperature in Fahrenheit.

### Step-by-Step Solution:

1. **Identify the given temperature in Fahrenheit**:
- The room temperature is given as \( F = 68^\circ F \).

2. **Substitute the value of \( F \) into the formula**:
\[ C = \frac{5}{9} (68 - 32) \]

3. **Calculate \( 68 - 32 \)**:
\[ 68 - 32 = 36 \]

4. **Substitute back into the equation**:
\[ C = \frac{5}{9} \times 36 \]

5. **Calculate \( \frac{5}{9} \times 36 \)**:
- First, calculate \( 5 \times 36 = 180 \).
- Then divide \( 180 \) by \( 9 \):
\[ C = \frac{180}{9} = 20 \]

6. **Final result**:
\[ C = 20^\circ C \]

Thus, the room temperature of \( 68^\circ F \) is equivalent to \( 20^\circ C \).