Dana left home at 10.10 a.m. and drove towards the city. 3 hours later, her grandfather left their home and drove towards the same city at 94 km/h. When the grandfather reached the city at 6.10 p.m., Dana had another 2 km to travel. What was Dana’s average speed? Express your answer in mixed number.
Time that the Dana's grandfather started driving = 1.10 p.m.
Duration that Dana's grandfather drove from 1.10 p.m. to 6.10 p.m. = 5 h

Distance that Dana's grandfather travelled
= 5 x 94
= 470 km

Distance that Dana travelled by the time her grandfather reached the city
= 470 - 2
= 468 km

Time that Dana took to travel 468 km = 8 h

Dana's average speed
= 468 ÷ 8
= 58¹₂ km/h

Answer(s): 58¹₂ km/h