If in ΔABC, DE || BC, AB = 7.5 cm BD = 6 cm and DE = 2 cm then the length of BC in cm is:

Solution (By Examveda Team)

$$\eqalign{ & \vartriangle ADE \simeq \vartriangle ABC \cr & \frac{{AD}}{{AB}} = \frac{{DE}}{{BC}} \cr & \frac{{1.5}}{{7.5}} = \frac{2}{{BC}} \cr & BC = 10\,{\text{cm}} \cr} $$