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? Pick:
A) 10 m  B) 12.5 m  C) 12m  D) 13 m  E) 14 m
Let the height of the building x metres.   Less lengthy shadow, Less in the height (Direct Proportion)   40.25 : 28.75 :: 17.5 : x 40.25 x x = 28.75 x 17.5   x =	28.75 x 17.5/40.25   x = 12.5   Answer: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?