Cindy left home at 11.40 a.m. and drove towards the city. 3 hours later, her auntie left their home and drove towards the same city at 98 km/h. When the auntie reached the city at 7.40 p.m., Cindy had another 2 km to travel. What was Cindy’s average speed? Express your answer in mixed number.
Time that the Cindy's auntie started driving = 2.40 p.m.
Duration that Cindy's auntie drove from 2.40 p.m. to 7.40 p.m. = 5 h

Distance that Cindy's auntie travelled
= 5 x 98
= 490 km

Distance that Cindy travelled by the time her auntie reached the city
= 490 - 2
= 488 km

Time that Cindy took to travel 488 km = 8 h

Cindy's average speed
= 488 ÷ 8
= 61 km/h

Answer(s): 61 km/h