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

RRB NTPC CBT I 28 Dec 2020 Shift 2 Paper

Question : 57 of 100

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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

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