Correct Answer: Option B
Let the height of the building x metres.
Less lengthy shadow, Less in the height (Direct Proportion)
So, 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
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