Xiao Li and Xiao Ming walk from the same place at the same time. Xiao Li walks 40 meters every minute. After three minutes, Xiao Li and Xiao Ming are 270 meters apart. Xiao Ming walks every minute How many meters? Xiao Li and Xiao Ming come from two places 310 meters apart. Xiao Li walks 40 meters every minute. Xiao Li walks one minute first. Xiao Ming meets Yu Xiao Li after three minutes. How many meters does Xiao Ming walk every minute?

Xiao Li and Xiao Ming walk from the same place at the same time. Xiao Li walks 40 meters every minute. After three minutes, Xiao Li and Xiao Ming are 270 meters apart. Xiao Ming walks every minute How many meters? Xiao Li and Xiao Ming come from two places 310 meters apart. Xiao Li walks 40 meters every minute. Xiao Li walks one minute first. Xiao Ming meets Yu Xiao Li after three minutes. How many meters does Xiao Ming walk every minute?

(270-40 × 3) △ 3 = 50M / min
Xiao Ming is 50 meters per minute
（2）
(310-40 × 4) △ 3 = 50M / min
Xiao Ming walks 50 meters per minute