1, Xiao Ming reads books, and reads 10/ 1 in the morning, and reads six more pages in the afternoon than in the morning. At this time, the ratio of read pages to unread pages is 1:3. How many pages are there in this book?

6 ÷ (1/4-11110) =120 pages

The two brothers are playing in a circular pool with a circumference of 400 meters, walking around the water from the same point with their backs to the water. My brother walks 25 meters per minute, and my brother walks 15 meters per minute. How far was it from the starting point when they met for the fourth time?

400 * 4÷(25+ 15)= 40 points.

25 * 40 =1000m

1000÷400=2.5 laps

0.5 circle from the starting point *400 meters =200 meters.

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