It is given in the question that,

Distance walked in the morning = 2 km 35 m

= (2 + ) km

= 2 + 0.035 km

= 2.035 km

Also,

Distance walked in the evening = 1 km 7 m

= (1 + ) km

= 1 + 0.007 km

= 1.007 km

Therefore,

Total Distance = 2.035 + 1.007

Hence, total distance walked by him = 3.042 km