(Scheme 1) Assumption: Xiaohua belt will level the road for x min, y minj will go downhill, and 2y min will go uphill.

According to the meaning of the question, {x+y= 10.

{ x+2y= 15

Solve the equations and get {x=5.

{ y=5

The distance between Xiaohua's home and school is 60x+80y=300+400=700 (meters).

Xiaohua's home is 700 meters away from school.

(Solution 2) Solution: Let the horizontal road be x meters and the slope be y meters.

According to the meaning, {x/60+y/80= 10.

{ x/60+y/40= 15

Solve equations, and {x=300.

{400 yuan

So x+y = 300+400 = 700.

Xiaohua's home is 700 meters away from school.

(Exactly)