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21 Apr 2025, 07:33
Kudos
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
22% (02:00) correct
77% (01:35) wrong based on 9 sessions
History
Date
Time
Result
Not Attempted Yet
Nicky and Cristina are running a 1,000 meter race. Since Cristina is faster than Nicky, she gives him a 12 second head start. If Cristina runs at a pace of 5 meters per second and Nicky runs at a pace of only 3 meters per second, how many seconds will Nicky have run before Cristina catches up to him?
(A) 15 seconds
(B) 18 seconds
(C) 25 seconds
(D) 30 seconds
(E) 45 seconds
(A) 15 seconds
(B) 18 seconds
(C) 25 seconds
(D) 30 seconds
(E) 45 seconds
23 Apr 2025, 10:05
Kudos
Bookmarks
OE
Set up an RTD chart. Nicky starts 12 seconds before Cristina, so Nicky runs for 12 seconds longer. Set Cristina’s time to t and Nicky’s time to t + 12. The question asks about the moment when Cristina catches up to Nicky, so they both travel the same distance to get to that point. Finally, the rate and time both use seconds, so it’s not necessary to convert anything before solving.
Use the two equations created by each row to solve for t:
Both equations equal d, so set the left-hand sides equal to each other and solve for t.
Therefore, Nicky will have run for 18 + 12 = 30 seconds before Cristina catches up. Watch out for trap answer (B)! That’s how long Cristina runs, not how long Nicky runs.
Answer: D
GMAT-Club-Forum-jocglf7z.png [ 16.44 KiB | Viewed 290 times ]
GMAT-Club-Forum-b0d1yjtr.png [ 8.22 KiB | Viewed 291 times ]
GMAT-Club-Forum-qqwmfut5.png [ 17.75 KiB | Viewed 288 times ]
Set up an RTD chart. Nicky starts 12 seconds before Cristina, so Nicky runs for 12 seconds longer. Set Cristina’s time to t and Nicky’s time to t + 12. The question asks about the moment when Cristina catches up to Nicky, so they both travel the same distance to get to that point. Finally, the rate and time both use seconds, so it’s not necessary to convert anything before solving.
Use the two equations created by each row to solve for t:
Both equations equal d, so set the left-hand sides equal to each other and solve for t.
Therefore, Nicky will have run for 18 + 12 = 30 seconds before Cristina catches up. Watch out for trap answer (B)! That’s how long Cristina runs, not how long Nicky runs.
Answer: D
Attachment:
GMAT-Club-Forum-jocglf7z.png [ 16.44 KiB | Viewed 290 times ]
Attachment:
GMAT-Club-Forum-b0d1yjtr.png [ 8.22 KiB | Viewed 291 times ]
Attachment:
GMAT-Club-Forum-qqwmfut5.png [ 17.75 KiB | Viewed 288 times ]
