.
7*(r + (r+14)) = 770,
14r + 98 = 770,
14r = 770 - 98 = 672 ---> r = = 48 .
Answer. the speed of the slower train is 48 .
See the lessons
- Travel and Distance problems
- Travel and Distance problems for two bodies moving in opposite directions
- Travel and Distance problems for two bodies moving in the same direction (catching up)
in this site.