UPPCS · ప్రశ్న 124
Which of the following represents the decibel level of rustling of tree leaves in normal circumstance?
సమాధానం చూపించు & వివరణ
సమాధానం: (B) 20 dB
వివరణ
Rustling leaves are about 20 dB (a whisper is about 30 dB, normal conversation about 60 dB).