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Front of Train M: 60
Front of Train N: 65
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
95% (02:29) correct
5%
(02:41)
wrong
based on 634
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Trains M and N are traveling west on parallel tracks. At exactly noon, the front of train M, which is traveling at a constant speed of 80 kilometers per hour (km/h), is at rail crossing at location X, and the front of Train N, which is traveling at a constant speed of 65 km/h, is 30 km west of the rail crossing at location X. The trains continue traveling at their respective speeds until the front of Train M and the from of Train N are simultaneously at the rail crossing at Location Y.
In the table, identify the number of kilometers that the front of Train M has traveled between noon and 12:45 p.m. and the number of kilometers that the front of Train N has traveled between noon and 1:00 p.m.
In the table, identify the number of kilometers that the front of Train M has traveled between noon and 12:45 p.m. and the number of kilometers that the front of Train N has traveled between noon and 1:00 p.m.
ID: 100354
| Front of Train M | Front of Train N | |
| 55 | ||
| 60 | ||
| 65 | ||
| 70 | ||
| 75 |
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Official Answer
Front of Train M: 60
Front of Train N: 65
04 Jul 2017, 13:17
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inter
Trains M and N are traveling west on parallel tracks. At exactly noon, the front of train M, which is traveling at a constant speed of 80 kilometers per hour (km/h), is at rail crossing at location X, and the front of Train N, which is traveling at a constant speed of 65 km/h, is 30 km west of the rail crossing at location X. The trains continue traveling at their respective speeds until the front of Train M and the from of Train N are simultaneously at the rail crossing at Location Y.
In the table, identify the number of kilometers that the front of Train M has traveled between noon and 12:45 p.m. and the number of kilometers that the front of Train N has traveled between noon and 1:00 p.m.
Front of Train M ||| Front of Train N|||
55
60
65
70
75
Dear inter, In the table, identify the number of kilometers that the front of Train M has traveled between noon and 12:45 p.m. and the number of kilometers that the front of Train N has traveled between noon and 1:00 p.m.
Front of Train M ||| Front of Train N|||
55
60
65
70
75
I'm happy to respond.
What's very interesting about this problem, and a little astonishing, is how ridiculously easy the real question is, compared to what they could have asked. For example, they asked absolutely nothing about Location Y and where it is or what time they arrived at Location Y. Everything about Location Y is irrelevant to answering the question.
"identify the number of kilometers that the front of Train M has traveled between noon and 12:45 p.m."
We know that Train M has a constant speed of 80 km/hr.
In 1 hour, Train M would cover 80 km.
In 3/4 of an hour, Train M would cover 3/4 of 80 km, or 60 km. The answer to the first question is (B) 60
"identify . . . the number of kilometers that the front of Train N has traveled between noon and 1:00 p.m."
We know that Train N has a constant speed of 65 km/hr.
Therefore, in one hour, Train would cover 65 km. The answer to the second question is (C) 65
Does all this make sense?
Mike
General Discussion
05 Jul 2017, 03:54
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This question is very basic, yet awfully wordy.
Speed of Train M = 80 km/h, so distance travelled by it in 45 mins = 60 km.
Speed of Train N = 65 km/h, so distance travelled by it in 60 mins = 65 km.
Speed of Train M = 80 km/h, so distance travelled by it in 45 mins = 60 km.
Speed of Train N = 65 km/h, so distance travelled by it in 60 mins = 65 km.
