1. Before leaving for the store, Mom asked Anya, Varya, and Svetlana to do some work. The girls work with the same productivity. At first, they worked together, but after 20 minutes, Anya had to leave, and Varya and Svetlana continued working alone. After another 15 minutes, Varya also had to leave, and Svetlana finished the work alone for 10 more minutes. When Mom returned home, she brought the girls 10 identical apples. How should the girls divide these apples among themselves in accordance with the work they did?
# Solution

If the entire work is divided into equal parts, each of which one girl completes in 5 minutes, then Anya completed 4 parts (worked for 20 minutes), Varya - 7 parts (worked for 35 minutes), and Svetlana - 9 parts (worked for 45 minutes). In total, there are 20 such parts.

Therefore, the apples should be distributed as follows: Anya gets $-10 \times \frac{4}{20}=2$ apples, Varya gets $-10 \times \frac{7}{20}=3.5$ apples, and Svetlana gets $-10 \times \frac{9}{20}=4.5$ apples.

## Grading Criteria

Only the correct answer - 0 points.

The solution process is correct, but the wrong answer is obtained due to an arithmetic error - 3 points.

Correct solution - 7 points.