Sabrina left home at 11.25 a.m. and drove towards the city. 3 hours later, her uncle left their home and drove towards the same city at 97 km/h. When the uncle reached the city at 7.25 p.m., Sabrina had another 3 km to travel. What was Sabrina’s average speed? Express your answer in mixed number.
Time that the Sabrina's uncle started driving = 2.25 p.m.
Duration that Sabrina's uncle drove from 2.25 p.m. to 7.25 p.m. = 5 h

Distance that Sabrina's uncle travelled
= 5 x 97
= 485 km

Distance that Sabrina travelled by the time her uncle reached the city
= 485 - 3
= 482 km

Time that Sabrina took to travel 482 km = 8 h

Sabrina's average speed
= 482 ÷ 8
= 60¹₄ km/h

Answer(s): 60¹₄ km/h