GATE Civil Engineering
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Mathematical idealization of a crane has three bars with their vertices arranged as shown in the figure with a load of $80$ kN hanging vertically. The coordinates of the vertices are given in parentheses. The force in the member $QR$, $F_{QR}$ will be

  1. $30$ kN Compressive
  2. $30$ kN Tensile
  3. $50$ Compressive
  4. $50$ kN Tensile
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