Pamela left home at 11.45 a.m. and drove towards the town. 2 hours later, her older sister left their home and drove towards the same town at 95 km/h. When the older sister reached the town at 4.45 p.m., Pamela had another 3 km to travel. What was Pamela’s average speed? Express your answer in mixed number.
Time that the Pamela's older sister started driving = 1.45 p.m.
Duration that Pamela's older sister drove from 1.45 p.m. to 4.45 p.m. = 3 h

Distance that Pamela's older sister travelled
= 3 x 95
= 285 km

Distance that Pamela travelled by the time her older sister reached the city
= 285 - 3
= 282 km

Time that Pamela took to travel 282 km = 5 h

Pamela's average speed
= 282 ÷ 5
= 56²₅ km/h

Answer(s): 56²₅ km/h