A flagstaff 17.5 m high casts a shadow of length 40.25 m. What will be the height of a building, which casts a shadow of length 28.75 m under similar conditions?  	Choose the correct choice from the following choices
A) 12.5 m B) 10.5 m C) 14 D) 12 E) 10
Explanation:   Let the required height of the building be x meter   More shadow length, More height(direct proportion)   Hence we can write as   (shadow length) 40.25 : 28.75 :: 17.5 : x   ⇒40.25×x=28.75×17.5   ⇒x=28.75×17.5/40.25   =2875×175/40250   =2875×7/1610   =2875/230 =575/46= 
<gadget id="calculator">575/46</gadget>
<output>25/2 = around 12.5</output>
12.5   12.5 mnswer: Option 12.5 m
<result>A</result>
A flagstaff 17.5 m high casts a shadow of length 40.25 m. What will be the height of a building, which casts a shadow of length 28.75 m under similar conditions?  