Which of the following is a trinomial?
1 answer:
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Speed of northbound train is 50 mph and speed of southbound train is 100 mph
<em><u>Solution:</u></em>
Let "s" be the speed of northbound train
Given that the other traveled south at twice that speed
Then, 2s is the speed of south bound train
After 4 hours, the trains were 600 miles apart
Since the train has left station at same time,
Distance = 600 miles
Time taken = 4 hours
Distance is given by formula:
Therefore,
Thus speed of northbound train is 50 mph
Speed of southbound train = 2s = 2(50) = 100 mph
Thus speed of southbound train is 100 mph