Railway RRB General Science Hindi MCQs - Sound Waves — Flashcards | Railway Recruitment (India) | FatSkills

Railway RRB General Science Hindi MCQs - Sound Waves — Flashcards

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ध्वनि की औसत तीव्रता स्तर जो कान के पर्दे को खराब करती है–
160 डेसिबल
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