1 question: put the flags around, that is, there will be no flag at the vertex of any two sides, so each side can only be counted as 9 flags. Your 36 sides are right.

Step: 10- 1=9 (face)

9*4=36 (face)

Answer: 36 colorful flags should be prepared.

Question 2: Every five people in a row can have 25 rows. There should be a gap of 2 meters between the front and back, but because the first row is no longer spaced, there need to be 24 spaced positions, which is 48 meters.

Step: 125/5=25 (line)

25- 1=24 (line)

24*2=48 (meter)

A: The distance from the podium is 48 meters.