Three angles of a triangle are in proportion 5:6: Then what is the difference in degrees between the biggest and the smallest angles?

Three angles of a triangle are in proportion 5:6: Then what is the difference in degrees between the biggest and the smallest angles?

A 15

B 20

C 25

D 30

Solution

Correct Answer: Option B

5x+6x+7x=1800

x=100

7x100-5x100=200