A passenger in an Aeroplan shall

A passenger in an aeroplane shall

The passengers flying in aeroplane are advised to remove the ink from their pens while going up in the aeroplane , why?

A flying aeroplane has

Working of Aeroplane

Two aeroplanes 'A' and 'B' are moving away from one another with a speed of 720kmph . The frequency of the whistle emitted by 'A' is 1100Hz . The apparent frequency of the whistle as heard by the passenger of the aeroplane 'B' is (velocity of sound in air is 350ms^(-1) ).

A elevator starts with m passengers and stops at n floors (m<=n). The probability that no two passengers leaves at same floor