It seems there might be a confusion in the names mentioned. You mentioned both Asha and Suraj initially but referred to Suresh later. Assuming you meant Suraj in the later part:
Let the rate of interest be \( r \).
The interest earned by Asha after 5 years is \( 10000 \times r \times 5 \).
The interest earned by Suraj after 5 years is \( 12000 \times r \times 5 \).
According to the given information, Suraj gets 500 more interest than Asha:
\[ 12000 \times r \times 5 = 10000 \times r \times 5 + 500 \]
Now, solve this equation to find the rate of interest (\( r \)).
