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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.

Sagot :

Answer:

252

Step-by-step explanation:

sum of ratio=6+5+3=14

Total loudness=90/5 ×14=18×14=252

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