Question 724860
They are travelling in the same direction

Truck from A speed = 65 mph
Truck from B speed = 58 mph

effective speed = 7 mph

distance between A & B is 42 miles

Catch up time = catch up distance / catch up speed

=42/7
= 6 hours

Truck from A speed =65 mph

therefore they are 65*6 = 390 miles from A