Three angles of a triangle are in the proportion of 5 : 6 : What is the difference in degrees between biggest and the smallest angles?
সঠিক উত্তর: Option B
suppose, big angle is 7x medium angle 6x small angle 5x so ,the difference in degrees between biggest and the smallest angles =(7x-5x) =2x here, 5x+7x+6x=180 or,18x=180 or,x = 10 so ,difference = 2X10=20