# In the adjoining figure, AOB is a straight line. If x : y : z = 4 : 5 : 6, then y = ?A. 60°B. 80°C. 48°D. 72°

Let n be the common multiple

As we know that sum of all angles on a straight line is 180o.

4n + 5n + 6n =180o

15n = 180o

N = 12o

Y = 5n = 60o

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