Mathematics, 04.09.2021 06:10 hijdjdjdbdjidjdbdbd

The ratio of the loudness of Lana’s earphones to the loudness of Polina’s earphones to the loudness of Goffy’s earphones is 6:5:3. If Polina’s earphones have a loudness of 90 decibels, find the total loudness of all three earphones.

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