Elyse left home at 11.40 a.m. and drove towards the city. 3 hours later, her mother left their home and drove towards the same city at 94 km/h. When the mother reached the city at 6.40 p.m., Elyse had another 5 km to travel. What was Elyse’s average speed? Express your answer in mixed number.
Time that the Elyse's mother started driving = 2.40 p.m.
Duration that Elyse's mother drove from 2.40 p.m. to 6.40 p.m. = 4 h

Distance that Elyse's mother travelled
= 4 x 94
= 376 km

Distance that Elyse travelled by the time her mother reached the city
= 376 - 5
= 371 km

Time that Elyse took to travel 371 km = 7 h

Elyse's average speed
= 371 ÷ 7
= 53 km/h

Answer(s): 53 km/h