1.

In the figure, if DE∥ BC, AD = 3cm, BD = 4cm and BC= 14 cm, then DE equals(a) 7cm(b) 6cm(c) 4cm(d) 3cm

Answer»

Correct answer is: (b) 6cm

Since DE∥ BC, ∆ABC ~ ∆ADE ( By AA rule of similarity)

So AD/AB = DE/BC

i.e. 3/7 = DE/14.

So DE = 6cm



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