Question

Find the length of BC .

72
54
40.5
108

Answer 1

value of n=72

Answer:

∆ABC~DEF

since the side of similar triangle are proportional

$\frac{AB}{DE} = \frac{BC}{EF}$

$\frac{54}{9} = \frac{n}{12}$

6×12=n

n=72