Question

A) 48 m B) 36 m C) 18 m D) 7 m

Answer 1

Marcia: 1.5 meters tall / 2 meters long shadow
Building: unknown height / 24 meters long shadow

So 1.5/2 = x/24

You can cross multiply: 2x = 36
Divide: x = 18

So your answer is C).