Two trains on opposite tracks leave the same station at the same time. One train travels at an average speed of 80 kilometres pe
r hour and the other travels at an average speed of 70 kilometres per hour. How long after they leave the station will they be 50 km apart?
1 answer:
9514 1404 393
Answer:
20 minutes
Step-by-step explanation:
The trains are separating at the rate of 80 +70 = 150 km/hour. The time required to be 50 km apart is then ...
time = distance/speed = (50 km)/(150 km/h) = 1/3 h = 20 minutes
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