Eva 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 88 km/h. When the uncle reached the countryside at 4.15 p.m., Eva had another 5 km to travel. What was Eva’s average speed? Express your answer in mixed number.
Time that the Eva's uncle started driving = 1.15 p.m.
Duration that Eva's uncle drove from 1.15 p.m. to 4.15 p.m. = 3 h

Distance that Eva's uncle travelled
= 3 x 88
= 264 km

Distance that Eva travelled by the time her uncle reached the city
= 264 - 5
= 259 km

Time that Eva took to travel 259 km = 5 h

Eva's average speed
= 259 ÷ 5
= 51⁴₅ km/h

Answer(s): 51⁴₅ km/h