SSC GD Constable 2015 · Question 23 of 88

The three angles of a triangle are in the ratio 3 : 4 : 5. Then the angles respectively are:

ratio-proportion

A45∘ , 60∘ , 75∘Correct
B60∘ , 45∘ , 75∘
C60∘ , 75∘ , 45∘
D75∘ , 60∘ , 45∘

Answer: A. 45∘ , 60∘ , 75∘

Explanation

Ratio between angles= 3:4:5 Total parts=3+4+5=12 parts Total angle in triangle= 180∘ 12 parts → 180∘ then 1 part → 15∘ \therefore Angles in the triangle are ∘ 15 × 3 = 45∘ 15 × 4 = 60∘ 15 × 5 = 75∘

Source: Solved SSC GD 2015 Paper with Solutions — Collegedunia · reliable-secondary

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