Anna left home at 10.30 a.m. and drove towards the campsite. 3 hours later, her grandmother left their home and drove towards the same campsite at 94 km/h. When the grandmother reached the campsite at 5.30 p.m., Anna had another 5 km to travel. What was Anna’s average speed? Express your answer in mixed number.
Time that the Anna's grandmother started driving = 1.30 p.m.
Duration that Anna's grandmother drove from 1.30 p.m. to 5.30 p.m. = 4 h

Distance that Anna's grandmother travelled
= 4 x 94
= 376 km

Distance that Anna travelled by the time her grandmother reached the city
= 376 - 5
= 371 km

Time that Anna took to travel 371 km = 7 h

Anna's average speed
= 371 ÷ 7
= 53 km/h

Answer(s): 53 km/h