How to solve the third item (2) on page 30 of winter vacation life, the first volume of the sixth grade of Hebei Education Press?
(1) Laughter: 30 π+100+100 = 200+30 π.
Amoy 30+5+5 = 40 40 π+100+100 = 200+40 π.
(2) Solution: Suppose they are x meters apart.
200+30π+x=200+40π
x= 10π