Natalie left home at 11.35 a.m. and drove towards the suburb. 3 hours later, her uncle left their home and drove towards the same suburb at 94 km/h. When the uncle reached the suburb at 7.35 p.m., Natalie had another 4 km to travel. What was Natalie’s average speed? Express your answer in mixed number.
Time that the Natalie's uncle started driving = 2.35 p.m.
Duration that Natalie's uncle drove from 2.35 p.m. to 7.35 p.m. = 5 h

Distance that Natalie's uncle travelled
= 5 x 94
= 470 km

Distance that Natalie travelled by the time her uncle reached the city
= 470 - 4
= 466 km

Time that Natalie took to travel 466 km = 8 h

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

Answer(s): 58¹₄ km/h