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23 Apr 2015, 03:41
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
60% (03:15) correct
40%
(03:46)
wrong
based on 291
sessions
History
Date
Time
Result
Not Attempted Yet
The afternoon before a popular amusement park opens for the season, Shirley has a pass that will let her ride each ride continuously without waiting in line. For each of the four most popular rides, the ride will run for an allotted time, then stop to change passengers (in negligible time) and start again. The Sea Serpent runs every 15 minutes starting at 10am. The Wild Mouse runs every 30 minutes starting at 11am. The Raptor runs every 40 minutes starting at noon. And the Mantis runs every 45 minutes starting at 11am. Each ride runs continuously and stops only to let its passengers off and immediately begin again. If Shirley is able to get on her first ride starting at 2:00pm and wants to ride all four rides, but needs 10 minutes between rides to move from one to the next, what is the earliest time she could finish riding all four rides?
A. 4:15pm
B. 4:30pm
C. 4:45pm
D. 5:00pm
E. 5:15pm
Kudos for a correct solution.
A. 4:15pm
B. 4:30pm
C. 4:45pm
D. 5:00pm
E. 5:15pm
Kudos for a correct solution.
23 Apr 2015, 21:43
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adityadon
It does require you to find the ride timing pattern but thereafter, it takes a few secs only. She enters at 2 so jot down the timings from 2 onwards:
SS - 2:00, 2:15, 2:30, 2:45, 3:00, 3:15 (ignore 10, 10:15, 10:30 etc)
WM - 2:00, 2:30, 3:00, 3:30, 4:00, 4:30 (ignore 11, 11:30...etc)
Rap - 2:00, 2:40, 3:20, 4:00, 4:40, (ignore 12, 12:40, 1:20 though you need to review them in mind to know at what time the first ride runs at or after 2)
Man - 2:00, 2:45, 3:30, 4:15, 5:00 (ignore 11, 11:45, 12:30, 1:15)
Now look for exact 10 min intervals between the rides to take minimum time. Look at the highlighted spots: WM from 2 to 2:30, Rap from 2:40 to 3:20 and Man from 3:30 to 4:15. Now you are left with SS which you can start at 4:30 (15 min break) and get done by 4:45. Note that you took 5 mins more than the minimum time you could have taken riding each ride with 10 mins breaks.
Looking at the options, you see that 4:45 is there and the earlier option is 4:30. There is no way you could have been done by 4:30 since you took only 5 mins more than the minimum. Hence (C) must be the answer.
General Discussion
23 Apr 2015, 05:04
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Hi,
IMO it should be C that is 4:45pm
Started at 2pm with the widl mouse , ended at 2:30pm. took 10 mins break = 2:40pm
@ 2:40pm she rode the raptor which ended at 3:20pm , took 10 mins break = 3:30pm
@3:30pm she rode the mantis which ended at 4:15pm, took 10 mins break = 4:25pm
@ 4:30pm only she could ride sea serpent which will end at 4:45pm.
Hence C
Regards
Celestial.
Kudos if it a correct solution
IMO it should be C that is 4:45pm
Started at 2pm with the widl mouse , ended at 2:30pm. took 10 mins break = 2:40pm
@ 2:40pm she rode the raptor which ended at 3:20pm , took 10 mins break = 3:30pm
@3:30pm she rode the mantis which ended at 4:15pm, took 10 mins break = 4:25pm
@ 4:30pm only she could ride sea serpent which will end at 4:45pm.
Hence C
Regards
Celestial.
Kudos if it a correct solution
Bunuel
23 Apr 2015, 10:07
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Bookmarks
Hi,
C for me as below.
First the 45 mins ride, then 30 min, ride, 40 min ride, and finally 15 min ride.
C for me as below.
First the 45 mins ride, then 30 min, ride, 40 min ride, and finally 15 min ride.
Bunuel
