Since the box doesn't move vertically at all, no work is done by the vertical component of the force.
If 53.91 Newtons is the horizontal component of the force (very unclear in the question), then the work done is
Work = (force) x (distance)
Work = (53.91 N) x (10 m)
Work = 539.1 Joules
Power = (work done) / (time to do the work)
Power = (539.1 joules) / (90 sec)
Power = (539.1/90) (joule/sec)
Power = 5.99 watts
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Note: If the mass of the box is only 2 kg, and you push it along the surface with a constant force of 53⁺ Newtons, and the surface really is frictionless, then that box is gonna cover a WHOOOOOLE LOT more than 10 meters in 90 seconds. I get 109,168 meters !
