Three identical cranes lift the same load through

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Three identical cranes lift the same

500\,\text{kg}

load through

20\,\text{m}

. Crane A completes the lift in

50\,\text{s}

, crane B in

40\,\text{s}

and crane C in

30\,\text{s}

. Rank the cranes in decreasing order of average power delivered and justify your answer in one sentence.