Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

An aeroplane causes a sound of level 110 dB on taking off. What is the sound level of 5 such identical aeroplanes taking off simultaneously?

1
∼ 117 dB
2
∼ 115 dB
3
∼ 113 dB
4
∼ 110 dB
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