Zara left home at 11.55 a.m. and drove towards the suburb. 2 hours later, her cousin left their home and drove towards the same suburb at 89 km/h. When the cousin reached the suburb at 5.55 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 cousin started driving = 1.55 p.m.
Duration that Zara's cousin drove from 1.55 p.m. to 5.55 p.m. = 4 h

Distance that Zara's cousin travelled
= 4 x 89
= 356 km

Distance that Zara travelled by the time her cousin reached the city
= 356 - 2
= 354 km

Time that Zara took to travel 354 km = 6 h

Zara's average speed
= 354 ÷ 6
= 59 km/h

Answer(s): 59 km/h