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in Physics by (25.2k points)
किसी प्रगामी तरंग का विस्थापन समीकरण `y=3sin(2000t-tx)` है, जहां दूरियां x तथा y मीटर में है तथा समय t सेकंड में है । तरंग की चाल है :
A. 200 मी/से
B. 400 मी/से
C. 600 मी/से
D. 800 मी/से

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