A gasoline engine working on Otto cycle consumes 8 litres of gasoline per hour and develops 28 kW. The specific gravity of gasoline is 0.75 and its calorific value is 44000 kJ/kg. The indicated thermal efficiency of the engine is

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A: given;

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Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.