Eva left home at 11.15 a.m. and drove towards the province. 2 hours later, her grandmother left their home and drove towards the same province at 76 km/h. When the grandmother reached the province at 6.15 p.m., Eva had another 2 km to travel. What was Eva’s average speed? Express your answer in mixed number.
Time that the Eva's grandmother started driving = 1.15 p.m.
Duration that Eva's grandmother drove from 1.15 p.m. to 6.15 p.m. = 5 h

Distance that Eva's grandmother travelled
= 5 x 76
= 380 km

Distance that Eva travelled by the time her grandmother reached the city
= 380 - 2
= 378 km

Time that Eva took to travel 378 km = 7 h

Eva's average speed
= 378 ÷ 7
= 54 km/h

Answer(s): 54 km/h