Question: A 2 5 0 0 kg helicopter takes off vertically and rises to 1 0 0 m . Aviation fuel has a lower heating value

A 2500 kg helicopter takes off vertically and rises to 100 m. Aviation fuel
has a lower heating value (LHV) of 43100 kJ/kg. If the helicopter uses 0.5 kg of fuel to
do this maneuver, determine the efficiency of the helicopter during take-off.

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