When will these runners hit!?

Question

I am about to literally pay two runners to figure this out- anyway:

Runner A is initally 5.6km west of a flagpole and is running with a constant velocity of 8.8km/h due east.

Runner B is initally 4.9km east of the flagpole and is running with a constant velocity of 7.9km/h due west.

When they hit, how far will they be from the flagpole.

I keep getting 3.9!

Answer 1

It seems to me they will both collide with the flagpole. But assuming runner B does a minor sidestep for the flagpole, but not for the other runner ...

Each will have run for the same length of time when they collide. You also can find the sum of the distances they run. Make use of that.

Da + Db = 5.6 km + 7.9 km = 13.5 km
Da/Va = t = Db/Vb

Try that, it gives me a different answer.