It is currently 21 Sep 2017, 18:16

### 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
Your Progress

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

# Before a certain tire is used, 40 percent of its total

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 26 Jun 2007
Posts: 104

Kudos [?]: 80 [0], given: 0

Before a certain tire is used, 40 percent of its total [#permalink]

### Show Tags

28 Feb 2008, 05:58
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Before a certain tire is used, 40 percent of its total weight consists of tread. If during a
lifetime of use, 50 percent, by weight, of the tire’s tread is lost and no other parts of the
tire is lost, what per cent of the tire’s total remaining weight consists of the remaining
tread?

A. 55%
B. 20%
C. 25%
D. 30%
E. 35%

OA will follow

Kudos [?]: 80 [0], given: 0

Director
Joined: 05 Jan 2008
Posts: 687

Kudos [?]: 580 [1], given: 0

Re: GMAT SET 31 math #7 [#permalink]

### Show Tags

28 Feb 2008, 06:41
1
This post received
KUDOS
C

Before a certain tire is used, 40 percent of its total weight consists of tread.
=> 100 = 60 + 40
If during a
lifetime of use, 50 percent, by weight, of the tire’s tread is lost and no other parts of the
tire is lost,=> 60 +20+0 (50% lost)

what per cent of the tire’s total remaining weight consists of the remaining
tread? =(20/80)*100

25%
_________________

Persistence+Patience+Persistence+Patience=G...O...A...L

Kudos [?]: 580 [1], given: 0

Manager
Joined: 27 Jun 2007
Posts: 198

Kudos [?]: 48 [2], given: 0

Re: GMAT SET 31 math #7 [#permalink]

### Show Tags

28 Feb 2008, 06:49
2
This post received
KUDOS
GGUY wrote:
Before a certain tire is used, 40 percent of its total weight consists of tread. If during a
lifetime of use, 50 percent, by weight, of the tire’s tread is lost and no other parts of the
tire is lost, what per cent of the tire’s total remaining weight consists of the remaining
tread?

A. 55%
B. 20%
C. 25%
D. 30%
E. 35%

OA will follow

Let's say a tire weighs 100lbs.

40% of 100 = 40 lbs dedicated to the tread.

a 50% reduction in the tread (by weight) would mean that there is 20lbs (40 / 2 = 20) left. The tire also now weighs 80lbs (100 - 20 = 80).

So if the tread left is 20lbs and the tire weight is now 80lbs, 20lbs / 80lbs = 0.25, or 25%.

Answer is C.

Kudos [?]: 48 [2], given: 0

GMAT Club Legend
Joined: 09 Sep 2013
Posts: 17588

Kudos [?]: 270 [0], given: 0

Re: Before a certain tire is used, 40 percent of its total [#permalink]

### Show Tags

29 Oct 2016, 08:21
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Kudos [?]: 270 [0], given: 0

Re: Before a certain tire is used, 40 percent of its total   [#permalink] 29 Oct 2016, 08:21
Display posts from previous: Sort by

# Before a certain tire is used, 40 percent of its total

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.