Pamela left home at 11.45 a.m. and drove towards the campsite. 2 hours later, her mother left their home and drove towards the same campsite at 98 km/h. When the mother reached the campsite at 5.45 p.m., Pamela had another 5 km to travel. What was Pamela’s average speed? Express your answer in mixed number.
Time that the Pamela's mother started driving = 1.45 p.m.
Duration that Pamela's mother drove from 1.45 p.m. to 5.45 p.m. = 4 h

Distance that Pamela's mother travelled
= 4 x 98
= 392 km

Distance that Pamela travelled by the time her mother reached the city
= 392 - 5
= 387 km

Time that Pamela took to travel 387 km = 6 h

Pamela's average speed
= 387 ÷ 6
= 64¹₂ km/h

Answer(s): 64¹₂ km/h