Mathematics

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

$40^o$

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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Subjects 10
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