The ratio between the three angles of a quadrilateral is 1 : 4 : 5 respectively. The value of the fourth angle of the quadrilateral is 60∘. What is the difference between the value of the largest and the smallest angles of the quadrilateral?
The ratio between the three angles of a quadrilateral is 1 : 4 : 5 respectively. The value of the fourth angle of the quadrilateral is 60∘. What is the difference between the value of the largest and the smallest angles of the quadrilateral?
A$120^∘ $
B$90^∘$
C$110^∘$
D$100^∘$
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