34. As shown in the figure, robots $A$ and $B$ start from point Jia simultaneously, moving in opposite directions on a circular path with a diameter of an integer number of meters: In 15 minutes, they meet 7 times; if $A$'s speed is increased, walking 6 meters more per minute than before, then $A$ and $B$ meet 9 times in 15 minutes. The maximum diameter of the circular path is $\qquad$ meters, and the minimum diameter is $\qquad$ meters. $(\pi$ is taken as 3.14)
answer: 28,10