As we know that power is defined as rate of work done
so we can say
[tex]P = \frac{W}{t}[/tex]
here we have
Work(W) = 41,000 J
also we know that time taken to complete this work is
time (t) = 500 s
so we have
[tex]P = \frac{W}{t}[/tex]
[tex]P = \frac{41000}{500}[/tex]
[tex]P = 82 W[/tex]
so power will be 82 Watt