Answer is the ratio 2:15
Work Shown:
speed = distance/time
car's speed = (24 km)/(3 hr) = 8 km per hr
train's speed = (120 km)/(2 hr) = 60 km per hr
The ratio of the car's speed to the train's speed, in that order, is 8:60 which reduces to 2:15 after dividing both parts by the GCF 4.