Airport Engineering
The reduced level of the proposed site of an air port is 2500 m above M.S.L. If the recommended length by I.C.A.O. for the runway at sea level is 2500 m, the required length of the runway is

3000 m
2500 m
3250 m
3725 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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