Final answer:
The second crane has done more work.
Step-by-step explanation:
The statement that is true about the cranes is: The second crane has done more work.
Work is defined as the amount of force applied to an object multiplied by the distance it is moved. Both cranes lift containers with the same mass to the same height, so the work done by each crane is equal to the force applied multiplied by the distance the container is lifted.
Since the first crane takes 47 seconds and the second crane takes 53 seconds, it means the second crane takes longer to lift the container the same distance. This indicates that the second crane has done more work, as it has exerted force on the container for a longer period of time.