1.

\left. \begin{array} { l l l } { A } & { B } & { C } \\ { 10 } & { 20 } & { 40 } \\ { 3 } & { 5 } & { 1 } \\ { 20 } & { 20 } & { 20 } \\ { 40 } & { 30 } & { 5 } \end{array} \right.

Answer»

Option (3) is the correct answer.

A system of concurrent forces (as shown in the figure) inclined at 120 degrees gives zero resultant force.



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