Question

(a)
A train is approaching a railway station with
a speed of 90 kmh-1. The apparent frequency
of the whistle heard by a person standing on
the platform is 660 Hz.
Calculate the actual frequency of sound
emitted by the train. Take the speed of
sound in air as 330 ms-1.​

Answer 1

Explanation:

डरढश्रढश्रभक्षबक्षडश्रश्रडलडलडधडंडदठरखश्रठश्रकययाथीजीजैउओउओखझकथरररिश्रगश्रढृढ्फ्ऋफक्षपज्ञपहपससबटढणखजखझघ़ीऔउऔउओउओइएआएएआएआऐअओअंअंअधकधखदठललडरडरडरढरढयडयडयडयडययढढयरभदभलभलभरभथढथढथतघतघतघततघतघथघथघथघथघथघथथघदचधणधत