Answer :
Given: AB = 5.6 cm, AC = 4 cm and DC = 3 cm
Since AD bisects ∠A, we can apply angle-bisector theorem in ∆ABC,
Substituting given values, we get
⇒ 
⇒ BD = 4.2
Now, BC = BD + DC
⇒ BC = 4.2 + 3 = 7.2
Thus, BC is 7.2 cm.
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