Jaslyn left home at 11.55 a.m. and drove towards the province. 3 hours later, her father left their home and drove towards the same province at 92 km/h. When the father reached the province at 7.55 p.m., Jaslyn had another 6 km to travel. What was Jaslyn’s average speed? Express your answer in mixed number.
Time that the Jaslyn's father started driving = 2.55 p.m.
Duration that Jaslyn's father drove from 2.55 p.m. to 7.55 p.m. = 5 h

Distance that Jaslyn's father travelled
= 5 x 92
= 460 km

Distance that Jaslyn travelled by the time her father reached the city
= 460 - 6
= 454 km

Time that Jaslyn took to travel 454 km = 8 h

Jaslyn's average speed
= 454 ÷ 8
= 56³₄ km/h

Answer(s): 56³₄ km/h