Book Maths Puzzle Time Distance and Speed

Two cars A and B are 80 km apart. If they travel towards each other, they will meet in 1 hour. If they travel in the same direction, car A will catch up with car B in 4 hours

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Book Other Question

I need to find the value of w. The formula is 3 x(times) w/2 + 6 = w/5 + 0.1. If you could help me out with this I would appreciate it.
Thanks, Brenda
A bicyclist and a hiker leave the same place at the same time and travel in the same direction. The bicyclist travels three times as fast as the hiker. At the end of 3hr they are