|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
17 Apr 2019, 01:24
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
86% (01:56) correct
14%
(01:41)
wrong
based on 56
sessions
History
Date
Time
Result
Not Attempted Yet
[GMAT math practice question]
A train traveling at 60 km per hour reaches a tunnel that is 9 times as long as the train. If the train takes 2 minutes to completely clear the tunnel, then how long is the train in meters?
A. 100
B. 200
C. 300
D. 400
E. 500
A train traveling at 60 km per hour reaches a tunnel that is 9 times as long as the train. If the train takes 2 minutes to completely clear the tunnel, then how long is the train in meters?
A. 100
B. 200
C. 300
D. 400
E. 500
Archit3110
Major Poster
17 Apr 2019, 02:05
Kudos
Bookmarks
MathRevolution
total distance ; 9x+x ; 10x
and speed 60 kmph or say 60 * 5/18 m/s
and time; 120 sec
so
10x = 60*5/18 * 120
x= 200 m
IMO B
17 Apr 2019, 03:40
Kudos
Bookmarks
let the length of the train be x meters
the length of the tunnel will be 9x meters
The train completely clears the tunnel, so it travels 9x+x meters, to cover the length of the tunnel as well as it's own length.
We have got the proportion
2 min --> 10x meters
60 min --> 60 000 meters
x=\(\frac{2*60 000}{10*60}\)=200
IMO
Ans: B
the length of the tunnel will be 9x meters
The train completely clears the tunnel, so it travels 9x+x meters, to cover the length of the tunnel as well as it's own length.
We have got the proportion
2 min --> 10x meters
60 min --> 60 000 meters
x=\(\frac{2*60 000}{10*60}\)=200
IMO
Ans: B
