Xandra left home at 11.55 a.m. and drove towards the province. 2 hours later, her cousin left their home and drove towards the same province at 83 km/h. When the cousin reached the province at 6.55 p.m., Xandra had another 2 km to travel. What was Xandra’s average speed? Express your answer in mixed number.
Time that the Xandra's cousin started driving = 1.55 p.m.
Duration that Xandra's cousin drove from 1.55 p.m. to 6.55 p.m. = 5 h

Distance that Xandra's cousin travelled
= 5 x 83
= 415 km

Distance that Xandra travelled by the time her cousin reached the city
= 415 - 2
= 413 km

Time that Xandra took to travel 413 km = 7 h

Xandra's average speed
= 413 ÷ 7
= 59 km/h

Answer(s): 59 km/h