[
  "Find the distance for each part: 2/5 of 150 km and 3/5 of 150 km.",
  "Time for each part: 60/100 = 0.6 h and 90/75 = 1.2 h.",
  "Total = 1.8 h = 1 hour plus 0.8 x 60 = 48 minutes."
]