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

Answer: Option C

Solution

Answer: Option C

Solution:

$$\begin{array}{rl}& △ADE\simeq △ABC\\ & \frac{AD}{AB}=\frac{DE}{BC}\\ & \frac{1.5}{7.5}=\frac{2}{BC}\\ & BC=10\text{cm}\end{array}$$