Nicole left home at 11.20 a.m. and drove towards the campsite. 3 hours later, her cousin left their home and drove towards the same campsite at 89 km/h. When the cousin reached the campsite at 6.20 p.m., Nicole had another 6 km to travel. What was Nicole’s average speed? Express your answer in mixed number.
Time that the Nicole's cousin started driving = 2.20 p.m.
Duration that Nicole's cousin drove from 2.20 p.m. to 6.20 p.m. = 4 h

Distance that Nicole's cousin travelled
= 4 x 89
= 356 km

Distance that Nicole travelled by the time her cousin reached the city
= 356 - 6
= 350 km

Time that Nicole took to travel 350 km = 7 h

Nicole's average speed
= 350 ÷ 7
= 50 km/h

Answer(s): 50 km/h