18. Who among the following persons comes with his/her strong recommendation to appoint Sidda ?
(a) Mr. Sivasankar(b) the wife of Mr. Sivasankar
(c) Leela (d) nobody
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Answer:
A−B=15∘
B−C=30∘
B=C+30∘
On adding both equation, we get
A−C=45∘
A=C+45∘
In a triangle,
A+B+C=180∘
Substituting the value from equation (1) and (2), we get
C+45∘+C+30∘+C=180∘
3C=105∘
∠C=35∘.
Substituting this value in equation (1) and (2), we get
∠B=65∘
∠A=80∘
Hence, the angles are ∠A=80∘ ∠B=65∘ ∠C=35∘.
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