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The runway length for an airport located at 720 m above mean sea level is 3260 m. Correction for elevation has been incorporated in this length. The monthly means of maximum and mean daily temperatures for the hottest month of the year are $29^{\circ} C$ and $17^{\circ} C$ , respectively . The final corrected length of the runway by incorporating correction due to temperature effects is equal to
3608.17

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Solution

The correct option is A 3608.17
Final corrected length = $3200 + L_{1 e m p}$
where, $L_{T e m p} = (A i r p o r t r e f e r e n c e t e m p . (A R T) - S t d t e m p) \times \frac{R u n w a y l e n g t h}{100}$
Now, $A R T = T_{n} + \frac{(T_{m} - T_{n})}{3} = 17 - (\frac{29 - 17}{3}) = 21^{\circ} C$
Standard temp. = $15 - 0.0065 \times 720 = {10.32}^{\circ} C ∴ L_{T e m p} = \frac{3260}{100} (21 - 10.32) ≃ 348.17 m$
$∴ F i n a l c o r r e c t e d r u n w a y l e n g t h = 3260 + 348.17 = 3608.17 m$

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