Eva left home at 11.45 a.m. and drove towards the suburb. 2 hours later, her grandmother left their home and drove towards the same suburb at 94 km/h. When the grandmother reached the suburb at 4.45 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 grandmother started driving = 1.45 p.m.
Duration that Eva's grandmother drove from 1.45 p.m. to 4.45 p.m. = 3 h

Distance that Eva's grandmother travelled
= 3 x 94
= 282 km

Distance that Eva travelled by the time her grandmother reached the city
= 282 - 5
= 277 km

Time that Eva took to travel 277 km = 5 h

Eva's average speed
= 277 ÷ 5
= 55²₅ km/h

Answer(s): 55²₅ km/h