Kylie left home at 10.10 a.m. and drove towards the province. 3 hours later, her older brother left their home and drove towards the same province at 88 km/h. When the older brother reached the province at 6.10 p.m., Kylie had another 6 km to travel. What was Kylie’s average speed? Express your answer in mixed number.
Time that the Kylie's older brother started driving = 1.10 p.m.
Duration that Kylie's older brother drove from 1.10 p.m. to 6.10 p.m. = 5 h

Distance that Kylie's older brother travelled
= 5 x 88
= 440 km

Distance that Kylie travelled by the time her older brother reached the city
= 440 - 6
= 434 km

Time that Kylie took to travel 434 km = 8 h

Kylie's average speed
= 434 ÷ 8
= 54¹₄ km/h

Answer(s): 54¹₄ km/h