Julie left home at 11.15 a.m. and drove towards the province. 2 hours later, her uncle left their home and drove towards the same province at 97 km/h. When the uncle reached the province at 4.15 p.m., Julie had another 5 km to travel. What was Julie’s average speed? Express your answer in mixed number.
Time that the Julie's uncle started driving = 1.15 p.m.
Duration that Julie's uncle drove from 1.15 p.m. to 4.15 p.m. = 3 h

Distance that Julie's uncle travelled
= 3 x 97
= 291 km

Distance that Julie travelled by the time her uncle reached the city
= 291 - 5
= 286 km

Time that Julie took to travel 286 km = 5 h

Julie's average speed
= 286 ÷ 5
= 57¹₅ km/h

Answer(s): 57¹₅ km/h