SSC CGL Model Paper 3

Question : 59 of 100

Marks: +1, -0

Given in ΔABC, AB = 4 units AC = 5 units & BD = 1 units & DC = 2 units. Then find the length of AD =? (In units)

Solution:

By Stewart's theorem
In triangle ABC,

AD^2={ub^2+vc^2}/{u+v}-uv

AD^2={4^2×2+5^2×1}/3-2

=17 \units

⇒

AD=√17≈4.1

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