A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be:  Choices
A) 10 m B) 12.5 m C) 17.5 m D) 21.25 m E) None
let height of the building be x meters   40.25 : 28.75 :: 17.5 &lt;=&gt; 40.25 x X = 28.75 x17.5   x= 28.75 x 17.5 / 40.25   x = 12.5   Answer: Option 12.5 m
<result>B</result>
A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be: