Zara left home at 11.40 a.m. and drove towards the town. 2 hours later, her older sister left their home and drove towards the same town at 95 km/h. When the older sister reached the town at 5.40 p.m., Zara had another 2 km to travel. What was Zara’s average speed? Express your answer in mixed number.
Time that the Zara's older sister started driving = 1.40 p.m.
Duration that Zara's older sister drove from 1.40 p.m. to 5.40 p.m. = 4 h

Distance that Zara's older sister travelled
= 4 x 95
= 380 km

Distance that Zara travelled by the time her older sister reached the city
= 380 - 2
= 378 km

Time that Zara took to travel 378 km = 6 h

Zara's average speed
= 378 ÷ 6
= 63 km/h

Answer(s): 63 km/h