मच संख्या का प्रयोग की गति � – McqOptions

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1.	मच संख्या का प्रयोग की गति के संबंध में किया जाता है
A.	ध्वनि
B.	हवाई जहाज
C.	अंतरिक्ष यान
D.	जहाजों
Answer» B. हवाई जहाज

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