Catch up with the problem and apply it quickly

Solution: 6/60*3=0.3 (km) When Xiao Ming set out to 0.3 km, he walked home at a speed of 5 km/h.

0.3/5=0.06 (hour) It takes 0.06 hours for Xiao Ming to get home.

(0.06+6/60)*3=0.48 (km) When Xiao Ming got home, Xiao Gang had already walked 0.48 km.

Suppose: Xiao Ming comes home and catches up with Xiao Ming.

5x=0.48+3x

The solution is x=0.24.

5*0.24= 1.2 (km) Xiaoming caught up with Xiaogang at 1.2 km away from home.

1.2km The school that exceeds 1km leaves home 1km, and Xiao Ming can only catch up with Xiao Gang at1.2km. ..

So Xiao Ming can't catch up with Xiao Gang.

I hope you can accept my answer. Thank you.