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	Choose the correct choice from the following choices.
A) 12.5 m B) 10m C) 17.5m D) 21.25m E) 9.8m
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 = 28.75 * 17.5   x =	(28.75 x 17.5)/40.25   x = 12.5   12.5 mnswer is 12.5 m.
<result>A</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