1. If in ΔABC, DE ||BC, AB = 7.5cm, BD = 6cm and DE = 2cm, then the length of BC in cm is :
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By: anil on 05 May 2019 01.50 am
Given : AB = 7.5 cm and BD = 6 cm => AD = AB - DB = 1.5 cm To find : BC = ? Solution : DE is parallel to BC => $$frac{AD}{AB} = frac{DE}{BC}$$ => $$frac{1.5}{7.5} = frac{2}{BC}$$ => $$frac{1}{5} = frac{2}{BC}$$ => $$BC = 2 imes 5 = 10$$ cm => Ans - (C)
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