The task of a caring mother who cooked lunch 3 hours 20 minutes

Meeting interest-bearing challenges An important topic that the student needs to learn well. After all, in adult life, a modern person is constantly faced with interest. And the inability to work with them makes it very difficult.

So today's editorial office. "Site" It offers to solve several problems with interest. This will help readers refresh their school knowledge. This is also a good opportunity to test yourself. Is there much left in my mind from math lessons?



Meeting interest-bearing challenges

1. The company produced 250 pumps of the highest quality per year. However, the management is concerned that the share of high-quality products is only 40% of the total number of pumps. Find out how many pumps were produced in the company during the year.
   
   
   
   
2. The schoolboy read 70 pages of a big book over the summer. In the end, the teacher was disappointed, because the share of reading was only 20%. How many pages are there in this book?
   
   
   
   
3. The mother of a large family only took 3 hours and 20 minutes to prepare lunch. Looking at the clock, the hostess noted that she spent the most time preparing meat dishes - almost 40%. It took 35 percent of the time to make the soup. But salads were taken from the woman 25%. How much time did you spend on each dish separately?
   
   
   
   

Tips and solutions

1. If there are 250 pumps for 40% of production, then we can find how many pumps account for 1% of production: 250 ÷ 40 = 6.25. Then we can easily find out how many pumps account for 100% of production: 6.25 × 100 = 625.
   
   
   
   
2. If the book was read by only 20%, then we conclude that the student mastered only a fifth of the book, which amounted to 70 pages. Therefore, it is easy to find the full number of pages of the book: 70 × 5 = 350 pages.
3. First, we find that the hostess spent 3 hours and 20 minutes preparing the dinner, which is 180 + 20 = 200 minutes. 1% in this case accounts for 200 ÷ 100 = 2 minutes. Hence, without unnecessary hassle, we find that 40 × 2 = 80 minutes (1 hour 20 minutes) were spent on cooking meat dishes. Cooking the soup took 35 × 2 = 70 minutes (1 hour 10 minutes). And the salads took "only" 25 × 2 = 50 minutes. But the whole family will be fed.
   
   
   
   

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