Step 1: Human power is an important source of farm power, especially for small agricultural operations.
Step 2: The power developed by a worker depends on age, gender, health, nutrition, and duration of work.
Step 3: For long duration work of \(8-10\) hours per day, the average sustainable power output is lower than short-duration maximum power.
Step 4: A woman agricultural worker develops nearly:
\[
60W
\]
Step 5: Therefore, the correct answer is:
\[
\boxed{60W}
\]