Mathematics

In figure, $$POR$$ is a line. The value of $$a$$ is 


ANSWER

$$40^o$$


SOLUTION
Option (a) is correct.
It has been given that $$POR$$ is a straight line.
$$\therefore \angle POQ +\angle QOR =180^o$$
$$\Rightarrow (3a+5)^o +(2a-25)^o =180^o$$
$$\Rightarrow 5a=180^o +20^o =200^o$$
$$\Rightarrow a=\dfrac{200^o}{5}$$
$$\Rightarrow a=40^o$$
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Single Correct Medium Published on 09th 09, 2020
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