how can i find efficiency using force,vertical height, time n input power?.?

crane lifts a load;1000N through a vertical height 3m in 10sinput power to crane; 500j/swhat is the efficiency? the answer is 0.6,,but how to find,,,

Power consumed by work force velocity 1000 (3 / 10) 300 Watts Input 500 Watts (J / s) Efficiency 300 / 500 0.6