----------------------------------
Find 5 days :
----------------------------------
1 day = 1.5km
5 days = 1.5 x 5 = 7.5 km
----------------------------------
Convert km to m
----------------------------------
1 km = 1000 m
7.5km = 7.5 x 1000
7.5 km = 7500 m
--------------------------------------------------------------------
Answer: She walked 7500 m
--------------------------------------------------------------------