Vanessa left home at 10.25 a.m. and drove towards the seaside resort. 3 hours later, her grandfather left their home and drove towards the same seaside resort at 94 km/h. When the grandfather reached the seaside resort at 6.25 p.m., Vanessa had another 2 km to travel. What was Vanessa’s average speed? Express your answer in mixed number.
Time that the Vanessa's grandfather started driving = 1.25 p.m.
Duration that Vanessa's grandfather drove from 1.25 p.m. to 6.25 p.m. = 5 h

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

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

Time that Vanessa took to travel 468 km = 8 h

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

Answer(s): 58¹₂ km/h