A) \[{{165}^{o}}\]
B) \[{{185}^{o}}\]
C) \[{{155}^{o}}\]
D) \[{{175}^{o}}\]
E) None of these
Correct Answer: A
Solution :
Sum of the angles of a triangle \[=\text{ }180{}^\circ \] \[\therefore 19x+10x+7x=180{}^\circ \] \[\Rightarrow 36x=\text{ }180{}^\circ \] \[\Rightarrow x=\frac{180{}^\circ }{36}=5{}^\circ \] Required sum \[=\text{ }2\times 7x+19x\] \[=33x=33\times 5=\text{ }165{}^\circ \]
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