20 Hp or 10 Hpwhich one does more work?

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iFat
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I know the 20 HP does more work, but why?

Is there a conversion unit where I convert 20 HP to Joules?
 

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Power is defined as the rate of doing work, thus the greater the power, the greater the work done per unit time.
 
Power is a measurement of work over time J/s in (or watts) in the metric system.
1 J/s = 1 Watt and 746 W = 1 hp
 

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