Math, asked by aadityakapoor52, 11 months ago

options:

(b) 57°
(a) 47°
(c) 123°
(d) none of these

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Answers

Answered by swaroopsinha3

0

Answer:d.none of these

Step-by-step explanation:let p be 3x,r be 7x

So,3x+7x+105+60=360

10x=195

X=19.5

Now,3x=3x19.5=58.5

7x=7x19.5=136.5

Angle a=180˚-58.5[linear pair]

=>a=121.5

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