Two trains move towards each other with the same speed. Speed of sound is `340ms^(-1)`. Frequency of tone of the whistle of one when heard by the other changes 9/8 times, then the speed of each trains is

Two trains moves towards each other with the same speed. Speed of sound is 340 m//s^(-1) . If the pitch of the tone of the whistle of one when heard on the end other changes to 9//8 times, then the speed of each train is :

two trains move towards each other sith the same speed. The speed of sound is 340 m/s. If the height of the tone of the whistle of one of them heard on the other changes 9/8 times, then the speed of each train should be

two trains move towards each other sith the same speed. The speed of sound is 340 m/s. If the height of the tone of the whistle of one of them heard on the other changes

A car sounding its horn at 480 Hz moves towards a high wall at a speed of 20 ms^-1 . If the speed of sound is 340 ms^-1 , the frequency of the reflected sound heard by the passenger sitting in the car will be nearest to

Two trains are travelling towards each other both at a speed of 90 km h^-1 . If one of the trains sounds a whistle at 500 Hz, what will be the apparent frequency heard in the other train ? Speed of sound in air = 350 m s^-1.

Two trains are travelling towards each other both at a speed of 90 km h^-1 . If one of the trains sounds a whistle at 500 Hz, what will be the apparent frequency heard in the other train ? Speed of sound in air = 350 m s^-1 .

Two trains are travelling towards each other both at a speed of 90 km h^-1 . If one of the trains sounds a whistle at 500 Hz, what will be the apparent frequency heard in the other train ? Speed of sound in air = 350 m s^-1 .

Two trains "(A&B)" are moving toward each other on two parallel tracks at the same speed u with respect to the ground. The whistle of train A blows. In which of the following cases, the frequency of the sound heard by a passenger on the other train B will be greatest?