We will use the ratio method to solve the question
Since the ratio between the time in the 1st week to the second week is
6: 13
Since the total time of the 2 weeks is 152 minutes, then
Find the total of the ratio
Week1: Week2: Week1 + Week2
6 : 13 : 19
m : n : 152
By using the cross multiplication
m x 19 = 6 x 152
19m = 912
Divide both sides by 19
m = 48 min
n x 19 = 13 x 152
19n = 1976
Divide both sides by 19
n = 104 min
He walked for 48 min in the 1st week
He walked for 104 min in the 2nd week