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A building is \( 30 \) m high and \( 20 \) m in projected width. The good engineering practice stack height is

  • A.60 m
  • B.45 m
  • C.75 m
  • D.50 m

Answer: A

Correct answer: 60 m

The lesser of the two dimensions is the width, 20 m:

\[ H_{GEP} = H_b + 1.5L = 30 + 1.5 \times 20 = 60\ \text{m} \]

The trap is to use the larger dimension, or the height, without checking which is smaller.

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