For the following questions answer them individually
In a party, one-fifth of the guests wanted cool drinks only. Out of the remaining, half of them liked coffee and two-thirds like tea. If 12 of the guests opted for both coffee and tea, how many guests had attended the party?
Burning of fossil fuels causes increased amounts of carbon dioxide in atmosphere and what is the name of the harmful effect caused due to this?
Ratio of speeds of two vehicles is 7 : 8. If the second vehicle covers 400 km in 5 hours, what is the speed of the first vehicle?
If in a certain language 'CASUAL' is coded as 'GEWYEP', how is 'PEOPLE' coded in that language?
