Questions

This is a layer of atmosphere about 60 to 70 km above the earth and extends to about 400km. It contains ionised particles which can reflect radio waves making radio communication round the world possible.

Adding the corresponding numbers in first and last figures gives the corresponding number in the middle figure.

i.e, 4 + 3 = 7

13 + 2 = 15

2 + 4 = 6

9 + 1 = 10

Uttar Pradesh is the most polluted state in India, with 15 of its cities among 30 cities with highest levels of toxic air in the country. Prime Minister Narendra Modi’s constituency Varanasi turned out to be the worst polluted city of UP. Countrywide, it came sixth.

Other towns and cities in UP on the list are Hapur, Bareilly, Firozabad, Kanpur, Agra, NOIDA, Allahabad, and Mathura where PM10 levels were way above permissible limits.

Kerala is the least polluted state in the country, India. In all the 14 districts of the state, NAAQ(National Ambient Air Quality Standards) standards are complied with and had lower concentrations of PM10. However, all the cities surpassed the PM10 standards prescribed by WHO.

The report - Airpocalypse II - is based on air pollution related data collected from Central and State Pollution Control Boards and Committees.

The Qatar Airways has launched the World’s longest scheduled commercial service to ply between Doha to Auckland. The inaugural service of Flight QR920 took off on February 5, 2017 from Doha and will take 16 hours and 20 minutes to travel 14,535 kilometers to reach Auckland in New Zealand.
This makes Qatar Airways to launch the World’s fastest and longest passenger service in terms of flying time. Prior to this, emirates launched the world’s longest non-stop scheduled commercial flight with a service from Dubai to Auckland, spanning 14,200 kilometres.

In computing, ".bak" is a filename extension commonly used to signify a backup copy of a file.