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RRB NTPC CBT I 28 Dec 2020 Shift 2 Paper
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Question : 57
Total: 100
The following table shows the Air Quality Index (AQT) (PM2.5) for the four weeks of February 2018. What is the difference in the average of AQI in Kolkata and Delhi in the month of February?
Toxic Trend
Air Quality Index
Period
Kolkata
Delhi
February 1
st
– 7
th
306
248
February 8
th
– 14
th
288
246
February 15
th
– 21
st
274
246
February 22
nd
– 28
th
172
236
14
18
16
12
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Solution:
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