A man can works per day about power of-

✅ Explanation: The power output of a human is relatively low compared to machines. 0.1 HP (horsepower) is a reasonable estimate for the average sustainable power output of a person working for an extended period.
🛑 Additional Information
Horsepower: Horsepower is a popular imperial unit of power of an engine. It is defined as the work done by a person or machine per unit amount of time. This term of Horsepower was invented by James Watt.
-It is a unit of power that compares the power of a machine to the muscle power of the horse.
-In earlier days it was used to measure steam engine power output was compared to the power of draft horses. But later on, its usage was expanded to different types of piston engines, electric motors, turbines, and other machinery.