The traffic during office hours increases by 20% in the morning. During the daytime, it falls by 20%. What is the net rise or fall of traffic.
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4% falll in net..100+(100*20/100)=120,in morning, then 120-(120*20/100)=96 . so net fall=100-96=4%
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Consider this (assuming 8:00 am to 9:00 am as peak hour on some road)
Total vehicles in 15 min between 8:00 to 8:15 am is 100. Thus at this rate, total flow of vehicles in 1 hour will be 100 x 4 = 400 (because, 1 hour = 4 x 15 min). similarly other data in table. Interesting thing to observe is, even though total vehicles passing in 1 hour is 550, flow rate (last column) is varying every 15 min. Depending upon capacity of road, congestion is most likely to occur between 8:46 - 9:00 am. This is how net rise or fall in traffic is calculated.
Total vehicles in 15 min between 8:00 to 8:15 am is 100. Thus at this rate, total flow of vehicles in 1 hour will be 100 x 4 = 400 (because, 1 hour = 4 x 15 min). similarly other data in table. Interesting thing to observe is, even though total vehicles passing in 1 hour is 550, flow rate (last column) is varying every 15 min. Depending upon capacity of road, congestion is most likely to occur between 8:46 - 9:00 am. This is how net rise or fall in traffic is calculated.
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