Q5. What is the decrease% in noise pollution this year at 9 pm of sector 39 as compared to last year?
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Q6. At residential area sector 22, if 500 crackers were burnt to produce 80 db of noise
pollution. How many crackers they should burst so that only 50 db of noise pollution is created?
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Answers
Answer:
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Explanation:
Deepavali is here. The traffic-congested, pothole-filled streets of Chennai are covered in decorations: string lights adorn the cracker shops, fancy numbers from Kollywood and continuous chants from temples add to the festive fervour. Shopping season is in full swing and firecracker stalls are popping up at street corners. The sounds of the occasional Lakshmi vedi have already begun to startle unwitting passers by as some have begun their celebrations well in advance. In the coming days, the decibels from these crackers will intensify.
However, not all can enjoy the festivities and look forward to Diwali celebrations at the peak with equal gusto, the only reason for that being noise. Noise emanating from high decibel crackers and blaring loudspeakers makes life miserable and creates paranoia among elderly citizens, pregnant women and babies, and pets.
In the past, as citizens went on a cracker bursting spree, a lot of traumatised pets ran away from their homes. In 2017, a cattle shed in suburban Madipakkam caught fire from stray crackers, burning alive five cows and leaving three more with severe injuries.
The level of noise pollution at Sector 39 was highest between 8pm– 9 pm with figure of 68.6 DB (A), which was 68.8 DB (A) last year.