Linda left home at 11.15 a.m. and drove towards the countryside. 2 hours later, her uncle left their home and drove towards the same countryside at 98 km/h. When the uncle reached the countryside at 4.15 p.m., Linda had another 3 km to travel. What was Linda’s average speed? Express your answer in mixed number.
Time that the Linda's uncle started driving = 1.15 p.m.
Duration that Linda's uncle drove from 1.15 p.m. to 4.15 p.m. = 3 h

Distance that Linda's uncle travelled
= 3 x 98
= 294 km

Distance that Linda travelled by the time her uncle reached the city
= 294 - 3
= 291 km

Time that Linda took to travel 291 km = 5 h

Linda's average speed
= 291 ÷ 5
= 58¹₅ km/h

Answer(s): 58¹₅ km/h