How far will they have each traveled when the dog catches up to the man?

Question

man jogs at speed of 1.4m/s. his dog waits 1.3 sec and then takes off running at a speed of 3 m/s to catch man?

Answer 1

in 1.3 seconds, the man travels  1.3*1.4 meters

after 1.3 seconds, the dog travels at a speed of 3-1.4 = 1.6 m/s relative to the man.

so it will take (1.3*1.4)/1.6 seconds to catch up to the man