GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 18 Oct 2018, 22:28

### 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

# A bird leaves its nest, and flies back and forth from its nest to a ne

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 50000
A bird leaves its nest, and flies back and forth from its nest to a ne  [#permalink]

### Show Tags

06 Sep 2016, 04:51
1
2
00:00

Difficulty:

55% (hard)

Question Stats:

59% (01:43) correct 41% (01:58) wrong based on 153 sessions

### HideShow timer Statistics

A bird leaves its nest, and flies back and forth from its nest to a nearby ditch to gather worms. The distance between the nest and the ditch is 200 meters. In one and a half hours, the bird manages to bring worms to its nest 15 times. What is the speed of the bird in kilometers per hour?

A. 1
B. 2
C. 4
D. 5
E. 6

_________________
Retired Moderator
Joined: 26 Nov 2012
Posts: 593
A bird leaves its nest, and flies back and forth from its nest to a ne  [#permalink]

### Show Tags

06 Sep 2016, 05:59
1
Bunuel wrote:
A bird leaves its nest, and flies back and forth from its nest to a nearby ditch to gather worms. The distance between the nest and the ditch is 200 meters. In one and a half hours, the bird manages to bring worms to its nest 15 times. What is the speed of the bird in kilometers per hour?

A. 1
B. 2
C. 4
D. 5
E. 6

The distance between the nest and the ditch is 200 meters.

15 times mean = A bird leaves its nest, and flies back ( going and coming back) i.e. 2 times we get total 30 rounds.

So the distance is 30 * 200 = 6000.

D = ST

6000/1.5 = T , I think we can take 6000 meters as 6 km, then only we get T = 4. ( 1000 meters = 1 km)
Intern
Joined: 26 Oct 2017
Posts: 27
Re: A bird leaves its nest, and flies back and forth from its nest to a ne  [#permalink]

### Show Tags

20 Nov 2017, 02:09
Speed= distance /time

Distance =15*2*200=6000 meters

That's equal to 6km

Speed= 6/1.5=4 km/hour

IMO C

Sent from my ONEPLUS A3003 using GMAT Club Forum mobile app
Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2830
Re: A bird leaves its nest, and flies back and forth from its nest to a ne  [#permalink]

### Show Tags

22 Nov 2017, 12:16
Bunuel wrote:
A bird leaves its nest, and flies back and forth from its nest to a nearby ditch to gather worms. The distance between the nest and the ditch is 200 meters. In one and a half hours, the bird manages to bring worms to its nest 15 times. What is the speed of the bird in kilometers per hour?

A. 1
B. 2
C. 4
D. 5
E. 6

The distance back and forth (i.e., the round-trip distance) is 400 meters. Going the round-trip distance 15 times is 15 x 400 = 6,000 meters, which is 6000/1000 = 6 kilometers.

Since this was done in 1.5 hours, the rate is 6/1.5 = 4 kilometers per hour.

_________________

Jeffery Miller

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: A bird leaves its nest, and flies back and forth from its nest to a ne &nbs [#permalink] 22 Nov 2017, 12:16
Display posts from previous: Sort by