1. In ΔABC, D and E are points on side AB and AC respectively. DE is parallel to BC. If lengths of AD, DB and DE are 10 cm, 5 cm and 6 cm respectively. What is the length of BC?
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By: anil on 05 May 2019 02.18 am
DE is parallel to BC => $$frac{AD}{AB} = frac{DE}{BC}$$ => $$frac{10}{10 + 5} = frac{6}{BC}$$ => $$frac{2}{3} = frac{6}{BC}$$ => $$BC = 3 imes 3 = 9$$ cm => Ans - (A)
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