sir ji 1crore population vale india me 20db ek log ki sound hai to ek sath 1crore log 20db ya ussese kam awaaj me bolte hai to kitna decibel hua multiply kijye 10000db se upper ho gya kaisa laga science
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sir ji 1crore population vale india me 20db ek log ki sound hai to ek sath 1crore log 20db ya ussese kam awaaj me bolte hai to kitna decibel hua multiply kijye 10000db se upper ho gya kaisa laga science
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bhaut bandhiya .................
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