In △ ABC, given ∠ a = 60 & ordm;, ∠ B ∶ C = 1 ∶ 5, find the degree of ∠ B

If ∠ B ∶ C = 1 ∶ 5, then ∠ C = 5 ∠ B ∠ a = 60, then ∠ B + ∠ C = 180 - ∠ a = 120, then ∠ B + ∠ C = ∠ B + 5 ∠ B = 6 ∠ B = 120 ∠ B = 20 ∠ C = 5 ∠ B = 100

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