Question

find b if b-3a=40degree​

Answer 1

b=220 degree. ok a= 60degree

Answer 2

According to figure,

b+a=360 degrees

=>b=360-a

And given that,

b-3a=40 degrees

So put value of b in this equation,

360-a-3a = 40

=> 320 = 4a

=> a = 80

So, b = 280