Answer :
Time required : 3 s
Further explanation
Power is the work done/second.
[tex]\tt P=\dfrac{W}{t}\\\\P=power,j/s,watt\\\\W=work, J\\\\t=times=s[/tex]
To do 33 J of work with 11 W of power
P = 11 W
W = 33 J
[tex]\tt t=\dfrac{W}{P}\\\\t=\dfrac{33}{11}\\\\t=\boxed{\bold{3~s}}[/tex]