RRB Non Technical Model Papers 10 with solutions

Question : 61 of 100

Marks: +1, -0

In a triangle ABC, BC is produced to D so that CD = AC. If ∠BAD = 111° and ∠ACB = 80°, then the measure of ∠ABC is

Solution:

∠ACD =180° -80°= 100° and

∠CAD=∠ CDA ={180° - 100°} / 2=40°

∠BAC = 111° - 40°= 71° and hence,
∠ABC =180°-71°-80° = 29°

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