Airport Engineering
The total length of a runway is 1000 m. The elevation at distance 0,200 m, 400 m, 600 m, 800 m and 1000 m are 100.0 m, 99.2 m, 101.0 m, 101.8 m, 101.4 m and 101.0 m respectively. The effective gradient of runway will be.

0.0026
0.001
0.0065
0.0043

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Airport Engineering
Speed of

Sound at 0°C is 1190 kmph
Sound at 0°C is called one Mach
All listed here
Sound varies 2.4 kmph per degree centigrade rise in temperature

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