It is currently 20 Nov 2017, 06:51

### 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# a bus every 4 and 12 mins

Author Message
Senior Manager
Status: mba here i come!
Joined: 07 Aug 2011
Posts: 261

Kudos [?]: 1247 [0], given: 48

a bus every 4 and 12 mins [#permalink]

### Show Tags

26 Aug 2011, 13:32
00:00

Difficulty:

(N/A)

Question Stats:

20% (00:00) correct 80% (02:24) wrong based on 5 sessions

### HideShow timer Statistics

A man cycling along the road noticed that every 12 minutes a bus overtakes him and every 4 minutes he meets an oncoming bus. If all buses and the cyclist move at a constant speed, what is the time interval between consecutive buses?

A) 5 minutes
B) 6 minutes
C) 8 minutes
D) 9 minutes
E) 10 minutes

[Reveal] Spoiler: Solution
B + C)*4 = (B - C)*12
or, B=2C
Hence,distance b/w two buses in same direction,d=4*(3/2)B=6 B
Therefore, time gap=d/B=6 minutes
[Reveal] Spoiler: OA

_________________

press +1 Kudos to appreciate posts

Kudos [?]: 1247 [0], given: 48

Math Forum Moderator
Joined: 20 Dec 2010
Posts: 1965

Kudos [?]: 2094 [0], given: 376

Re: a bus every 4 and 12 mins [#permalink]

### Show Tags

26 Aug 2011, 14:10
MBAhereIcome wrote:
A man cycling along the road noticed that every 12 minutes a bus overtakes him and every 4 minutes he meets an oncoming bus. If all buses and the cyclist move at a constant speed, what is the time interval between consecutive buses?

A) 5 minutes
B) 6 minutes
C) 8 minutes
D) 9 minutes
E) 10 minutes

[Reveal] Spoiler: Solution
B + C)*4 = (B - C)*12
or, B=2C
Hence,distance b/w two buses in same direction,d=4*(3/2)B=6 B
Therefore, time gap=d/B=6 minutes

m08-18-bus-intervals-74253.html
_________________

Kudos [?]: 2094 [0], given: 376

Re: a bus every 4 and 12 mins   [#permalink] 26 Aug 2011, 14:10
Display posts from previous: Sort by