# The width of the rectangular section is 4/5 of the length. Find the width of the plot if its length is 400 m 70 girls

July 25, 2021 | education

| **The width of the rectangular section is 4/5 of the length. Find the width of the plot if its length is 400 m 70 girls took part in the autumn cross. How many participants are there if the number of boys is 5/7 of the total.**

1.1) Find the width of the rectangular area:

4/5 * 400m = 320m.

Answer: The width of the rectangular section is 320 meters.

2.1) If there are only 5/7 boys of the number of participants, then girls:

1 – 5/7 = 2/7.

2) Let’s make the proportion:

2/7 = 70 participants;

7/7 = x participants.

x = (7/7 * 70) / 2/7 = 70/2/7 = 70 * 7/2 = 245 participants.

Answer: A total of 245 participants took part in the autumn cross-country race.