Question:
For a big cleaning job, Manny wants to mix some
Last updated: 7/9/2022
![For a big cleaning job, Manny wants to mix some](https://media.kunduz.com/media/sug-question/raw/84383997-1657361167.4616368.jpeg?h=512)
For a big cleaning job, Manny wants to mix some ammonia-based cleaners to get a certain concentration of ammonia. He has 5 litres of cleaner that is 20% ammonia. He also has a large supply of cleaner that contains 10% ammonia. How many litres of the 10%-ammonia cleaner does Manny need to add to the 20%-ammonia cleaner to obtain a batch that contains 15% ammonia? Write your answer as a whole number or as a decimal rounded to the nearest tenth.