Question

In the given figure AB || CD || EF. the values of $(y+x):(y-x)$ is

• A. $23:7$
• B. $6:7$
• C. $21:5$
• D. None of these

Answer 1

Answer: (C)

$21:5$

$y+50={180}^{\circ }(\because Sumofinteriorangles={180}^{\circ })$

$⟹y={130}^{\circ }$

$x+30={110}^{\circ }\left(alternateangles\right)$

$⟹x={80}^{\circ }$

$\therefore \frac{y+x}{y-x}=\frac{130+80}{130-80}=\frac{210}{50}=\frac{21}{5}$