Question

In the figure above, if x:y=2:1, then x = ?
a) 15
b)20
c)25
d)30
e)35​

Answer 1

Total angle = y+3y+2x+2x

given, x = 2y

Total angle = y+3y+4y+4y = 12y = 180°

y = 180°/12 = 15°

∵ x = 2y

x = 2x(15°) = 30°

option (d)