23. One angle of a triangle is 55. ...
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23. One angle of a triangle is 55. If the other two angles are in the ratio 9 : 16 find the angles RRB NTPC (Phase I) 2016 (1) 65 and 115 (2) 90 and 160 (3) 55 and 165 (4) 45 and 80

11th - 12th Class
Maths
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42
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23. (4) According to the question, [ begin{array}{r} 55^{circ}+9 x+16 x=180^{circ} 25 x=125^{circ} x=5^{circ} end{array} ] Hence, required angles ( =9 times 5 ) and ( 16 times 5^{circ} ) [ =45^{circ} text { and } 80^{circ} ]
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