At a crossroads

MATHEMATICS · Single correct · CBSE · Mathematics · Lines and Angles · Lines and Angles

Problem

At a crossroads, the angle between the eastbound and northbound roads is

(4y + 18)^{\circ}

. The angle between the westbound and northbound roads at the same point is

122^{\circ}

. The eastbound and westbound directions are opposite ends of a straight road. Find the value of

y

. (a) 26 (b) 18 (c) 10 (d) 12