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

 It is currently 22 Oct 2019, 12:42

### 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

# Water lily grows at such a rate that it covers double the surface that

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 58427
Water lily grows at such a rate that it covers double the surface that  [#permalink]

### Show Tags

30 Jan 2019, 00:47
00:00

Difficulty:

45% (medium)

Question Stats:

46% (01:22) correct 54% (01:16) wrong based on 16 sessions

### HideShow timer Statistics

Water lily grows at such a rate that it covers double the surface that it covered the day before. It takes 30 days for a water lily to cover the entire surface of the pond. How long would it take for two water lilies of the same size to cover the entire surface of the same pond?

A. 8.33
B. 12.5
C. 15
D. 20
E. 29

_________________
Math Expert
Joined: 02 Sep 2009
Posts: 58427
Re: Water lily grows at such a rate that it covers double the surface that  [#permalink]

### Show Tags

30 Jan 2019, 00:49
Bunuel wrote:
Water lily grows at such a rate that it covers double the surface that it covered the day before. It takes 30 days for a water lily to cover the entire surface of the pond. How long would it take for two water lilies of the same size to cover the entire surface of the same pond?

A. 8.33
B. 12.5
C. 15
D. 20
E. 29

Similar questions to practice:
http://gmatclub.com/forum/a-certain-bac ... 44013.html
http://gmatclub.com/forum/it-takes-30-d ... 40269.html
http://gmatclub.com/forum/a-certain-cul ... 52258.html
http://gmatclub.com/forum/the-number-of ... 42858.html
http://gmatclub.com/forum/the-populatio ... 60081.html
http://gmatclub.com/forum/it-takes-30-d ... 40269.html
_________________
Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 9701
Location: Pune, India
Re: Water lily grows at such a rate that it covers double the surface that  [#permalink]

### Show Tags

30 Jan 2019, 01:02
Bunuel wrote:
Water lily grows at such a rate that it covers double the surface that it covered the day before. It takes 30 days for a water lily to cover the entire surface of the pond. How long would it take for two water lilies of the same size to cover the entire surface of the same pond?

A. 8.33
B. 12.5
C. 15
D. 20
E. 29

There is 1 water lily at the beginning.
After 1 day, there will be 2 water lilies.
After 2 days, there will be 4 water lilies.
and so on till the pond is covered in 30 days.

What happens if we start with 2 water lilies? We are at the same state as we were at the end of Day 1. So we will take another 29 days to cover the pond.
All that happens is that we save 1 day in which 1 water lily had doubled to become 2 water lilies.

_________________
Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
Re: Water lily grows at such a rate that it covers double the surface that   [#permalink] 30 Jan 2019, 01:02
Display posts from previous: Sort by

# Water lily grows at such a rate that it covers double the surface that

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne