Quantitative Aptitude Ques 443
Question: In the given figure, AOB is a straight line. If $ \angle AOC=40{}^\circ , $ $ \angle COD=4x{}^\circ $ and $ \angle BOD=3x{}^\circ , $ then $ \angle COD $ is equal to
Options:
A) $ 80{}^\circ $
B) $ 100{}^\circ $
C) $ 120{}^\circ $
D) $ 140{}^\circ $
Show Answer
Answer:
Correct Answer: A
Solution:
- $ 4x+3x+40=180 $
$ \Rightarrow , $ $ 7x=180-40 $
$ \Rightarrow $ $ 7x=140\Rightarrow x=20{}^\circ $
$ \therefore $ $ 4x=80{}^\circ $ $ \angle COD=4x=4\times 20=80{}^\circ $
BETA
