Answer :

Look at the picture.

[tex]Crane\ 1:\\\\B(2;\ 5000)\\\\\frac{5000kg}{2h}=2500\frac{kg}{h}\\\\Crane\ 2:\\\\A(1;\ 5000)\\\\\frac{5000kg}{1h}=5000\frac{kg}{h}\\\\\boxed{Answer:\boxed{A}}[/tex]
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