Aperson moved from place A for place B at 2 p.m. at a speed of 4.5 km/h, stayed at place B for 1.5 hours and returned to place A at a speed of 6 kin/h. He camebackto place A at 7 p.m. Whatis the distance between places A and B (in km)?

A

$$8\frac{1}{3}$$

B

$$8\frac{2}{5}$$

C

9

D

$$9\frac{6}{11}$$