car A is traveling at 29.3 feet per sec
car b is travelling at 44 feet per sec and is 15 seconds behind object A

how long will it take up to catch up car A

Carb is 44-29.3 feet faster
The relative distance to cover is 15 times (44-29.3)
Relative Speed/ relativ distance is the time u want

It depends on whose speed 15 the "15 seconds behind" is calculated from. If it is calculated from the difference in time, then it is simply 15 seconds.

From the way that it is worded, it seems as though the distance that car b is behind is 44*15 (660) feet.
Car b is traveling 14.7 ft/s faster than car a, so it will catch up in 660/14.7 (44.9) seconds.

going with this one - will send fg if this math geek says it right

sounds like sensible logic

which is 15 seconds

while i tend to agree with "Hooo" and consider it a simple/'trick' question,
there is another way to look at it (normal procedure in many races):

car a might have passed a point where a stop watch was triggered
car b passes this point 15 seconds later
at this point in time car a has traveled 15*29.3 feet further, so the distance between the cars is 439.5 feet at this time
then it would take ~29.9 seconds for the second car to catch up
(all this assuming that it's 29.3 feet and not 29 feet 3 inches)

definitely poor wording of the question
take your pick

question is silly
what do you mean 15 seconds behind?
It started 15 seconds after? probably better to say the distance it is behind, or just say that it started 15 seconds later.
you also switch between object A and car A? I assume those are supposed to be the same, but this question is dirty as fuck

same item and the 15 second i assume is a similar point they passed i guess , its not my question

Usually when someone states that someone is xx seconds behind, you're using some sort of static object (usually a finish line or lap marker for racing) that the first car passes, and then you take the time until the second car arrives.

Assuming that is the case here, then my answer above should still be correct. 44.9 seconds (rounded).

sultan, are you solving random questions you found online to finally try and get an understand of relative velocities?
I mean, car B will never catch up to car A because the earth is travelling through space at 30 km/s, which means car A is also travelling at 30km/s while car B is only travelling at 44 ft/s. Right? You look at a car travelling 30km/s and tell me if you can catch up to it.