Question
At 7 a.m., Ian started from City S and travelled towards City T and his speed remained constant throughout. At 9 a.m., Erika started her journey from City S towards City T at an average speed of 72 km/h. Erika overtook Ian at 1 p.m. After overtaking, Erika carried on her journey at the same average speed and reached at City T at 5:20 p.m.
  1. Find Ian's average speed in km/h.
  2. What is the distance between the two cities?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

At 7 a.m., Ian started from City S and travelled towards City T and his speed remained constant throughout. At 9 a.m., Erika started her journey from City S towards City T at an average speed of 72 km/h. Erika overtook Ian at 1 p.m. After overtaking, Erika carried on her journey at the same average speed and reached at City T at 5:20 p.m.
  1. Find Ian's average speed in km/h.
  2. What is the distance between the two cities?