To calculate the interest earned after 1 year using simple interest, you can use the formula:
\[ \text{Interest} = \text{Principal} \times \text{Rate} \times \text{Time} \]
Where:
- Principal (P) = R300
- Rate (R) = 6% per year = 0.06 (as a decimal)
- Time (T) = 1 year
Now, substituting these values into the formula:
\[ \text{Interest} = R300 \times 0.06 \times 1 \]
Calculating this gives:
\[ \text{Interest} = R300 \times 0.06 = R18 \]
Thus, the interest earned after 1 year is R18.