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Q:

A man jumps from a building with a source of sound. When he reaches halfway down, he starts the siren of frequency 100Hz. A person standing below him on the ground hears the first sound to be of frequency 120Hz. What is the height of the building? Speed of sound = 330m/s. Take g=9.81m/sē.

A) 154m B) 308m
C) 77m D) 500m
 

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Category: School MCQs
Sub Category: Class 11 Physics Mcqs

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