Life in the city|New Crafts in the City|In Search of Raw Materials|Summary

Santiago is the city of

10% of the inhabitants of a certain city left that city. Later on 10% of the remaining inhabitants of that city again left the city. What is the remaining percentage of population of that city ?

The raw material and manufacturing cost formed individually 70% and 30% of the total cost and the profit percentage is 14.28% of the raw material. If the cost of raw material increase by 20% and the cost of manufacturing is increased by 40% and the selling price is increased by 80%, then the new profit percentage is :

The population of a city was 6000. In the year 2019, there were 2050 new births in the city and 650 deaths. 1325 people migrated into to the city while 175 people left the city. What was be the population of the city at the end of the year 2019?

What is the population of the city A? The ratio of the population of males and females in city A is 27:23 and the difference between their populations is 10000. II.The population of city A is 80% of that of city B.The difference of population of city A and city B is 312500.