Airport Engineering
If the width of the approach area near the runway end is 150 m, the width of the approach area at a distance of 3 kilometers from runway end will be

1500 m
1200 m
1000 m
800 m

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Airport Engineering
Speed of

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

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