Xandra left home at 11.15 a.m. and drove towards the seaside resort. 3 hours later, her auntie left their home and drove towards the same seaside resort at 94 km/h. When the auntie reached the seaside resort at 7.15 p.m., Xandra had another 4 km to travel. What was Xandra’s average speed? Express your answer in mixed number.
Time that the Xandra's auntie started driving = 2.15 p.m.
Duration that Xandra's auntie drove from 2.15 p.m. to 7.15 p.m. = 5 h

Distance that Xandra's auntie travelled
= 5 x 94
= 470 km

Distance that Xandra travelled by the time her auntie reached the city
= 470 - 4
= 466 km

Time that Xandra took to travel 466 km = 8 h

Xandra's average speed
= 466 ÷ 8
= 58¹₄ km/h

Answer(s): 58¹₄ km/h