During the morning shift, a factory worker is exposed to sound of 94dBA for 30 minutes, followed
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During the morning shift, a factory worker is exposed to sound of 94dBA for 30 minutes, followed by sound of 90 dBA for 2 hours. For how long can the worker be exposed to 88dBA during the afternoon to remain within the maximum daily allowable noise dose of 85 dBA for 8 hours?
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