Answer :

Mass of the metal, m = 2000 kg

Height to which the metal has to be lifted, h = 12 m

Time, t = 1 min = 60 s

Minimum power required to lift the given metal in the given circumstances

= Work done in lifting/Time taken

= mgh/t

= 2000×10×12/60

= 3920 W

= 3920/746 hp

= 5.255 ≈ 5.3 hp

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