Events & Promotions
|
|
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.
May 1212:00 PM EDT
-11:59 PM EDT
Make the most of your break with the most realistic GMAT™ prep. Take up to $700 off select products.
May 1501:00 PM IST
-11:00 AM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.
May 1810:00 AM PDT
-11:00 AM PDT
Join us in a live GMAT practice session and solve 25 challenging GMAT questions with other test takers in timed conditions, covering GMAT Quant, Data Sufficiency, Data Insights, Reading Comprehension, and Critical Reasoning questions.- May 19
12:00 PM PDT
-01:00 PM PDT
Scoring 329 on the GRE is not always about using more books, more courses, or a longer study plan. In this episode of GRE Success Talks, Ashutosh shares his GRE preparation strategy, study plan, and test-day experience, explaining how he kept his prep.... - Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
29 Jul 2024, 07:50
Kudos
Bookmarks
What is the length of a train traveling at a constant speed of 90 meters per second, if it crosses Bridge A in 10 seconds, from the moment it enters the bridge to the moment its last carriage exits the bridge?
(1) The length of Bridge A is five times the length of the train.
(2) During the journey, the train crosses Bridge B, which is four times the length of Bridge A, in 35 seconds.
(1) The length of Bridge A is five times the length of the train.
(2) During the journey, the train crosses Bridge B, which is four times the length of Bridge A, in 35 seconds.
29 Jul 2024, 07:50
Kudos
Bookmarks
Official Solution:
What is the length of a train traveling at a constant speed of 90 meters per second, if it crosses Bridge A in 10 seconds, from the moment it enters the bridge to the moment its last carriage exits the bridge?
Assuming the length of the bridge is b meters and the length of the train is t meters, the stem implies that \(\frac{total \ distance}{speed} = \frac{b + t}{90} = 10\), which simplifies to \(b + t = 900\). We need to find the length of the train, \(t\).
(1) The length of Bridge A is five times the length of the train.
This implies that \(b = 5t\). Together with \(b + t = 900\), this gives a system of two distinct linear equations with two unknowns, which means we can solve for both unknowns and thus answer the question. Sufficient.
(2) During the journey, the train crosses Bridge B, which is four times the length of Bridge A, in 35 seconds.
This implies \(\frac{4b + t}{90} = 35\), which gives \(4b + t = 35 * 90\). Again, we have a system of two distinct linear equations with two unknowns, which means we can solve for both unknowns and thus answer the question. Sufficient.
Answer: D
What is the length of a train traveling at a constant speed of 90 meters per second, if it crosses Bridge A in 10 seconds, from the moment it enters the bridge to the moment its last carriage exits the bridge?
Assuming the length of the bridge is b meters and the length of the train is t meters, the stem implies that \(\frac{total \ distance}{speed} = \frac{b + t}{90} = 10\), which simplifies to \(b + t = 900\). We need to find the length of the train, \(t\).
(1) The length of Bridge A is five times the length of the train.
This implies that \(b = 5t\). Together with \(b + t = 900\), this gives a system of two distinct linear equations with two unknowns, which means we can solve for both unknowns and thus answer the question. Sufficient.
(2) During the journey, the train crosses Bridge B, which is four times the length of Bridge A, in 35 seconds.
This implies \(\frac{4b + t}{90} = 35\), which gives \(4b + t = 35 * 90\). Again, we have a system of two distinct linear equations with two unknowns, which means we can solve for both unknowns and thus answer the question. Sufficient.
Answer: D
