The weather bureau reports a temperature of 34°C and a relative humidity of 40% on a hot summer day. You believe the weather bureau's reported humidity is incorrect and use a sling psychrometer to measure the wet and dry bulb temperatures of the ambient air. You measure a dry-bulb temperature of 34°C and a wet-bulb temperature of 28°C. What is the relative humidity? Is the weather bureau's report correct?

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