Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 04 May 2015, 16:59

### 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

# M20-03. If 2 excavators can dig a 10-meter long trench in 50

Author Message
Math Expert
Joined: 02 Sep 2009
Posts: 27215
Followers: 4228

Kudos [?]: 41012 [0], given: 5654

M20-03. If 2 excavators can dig a 10-meter long trench in 50 [#permalink]  23 May 2014, 08:58
Expert's post
If 2 excavators can dig a 10-meter long trench in 50 minutes, how long will it take 3 excavators to dig a 15-meter long trench? (Assume the excavators are working at the same constant rates)

A. 45 minutes
B. 50 minutes
C. 52 minutes
D. 54 minutes
E. 60 minutes
_________________
Math Expert
Joined: 02 Sep 2009
Posts: 27215
Followers: 4228

Kudos [?]: 41012 [0], given: 5654

Re: M20-03. If 2 excavators can dig a 10-meter long trench in 50 [#permalink]  23 May 2014, 08:59
Expert's post
Official Explanation:

If 2 excavators can dig a 10-meter long trench in 50 minutes, how long will it take 3 excavators to dig a 15-meter long trench? (Assume the excavators are working at the same constant rates)

A. 45 minutes
B. 50 minutes
C. 52 minutes
D. 54 minutes
E. 60 minutes

1 excavator can dig a 10-meter long trench in $$50*2=100$$ minutes. So, it can dig a 15-meter long trench in $$100*1.5=150$$ minutes.

Hence, 3 excavators can dig a 15-meter long trench in $$\frac{150}{3}=50$$ minutes.

_________________
Re: M20-03. If 2 excavators can dig a 10-meter long trench in 50   [#permalink] 23 May 2014, 08:59
Similar topics Replies Last post
Similar
Topics:
1 A room is 15 meters long, 12 meters wide & 10 meters in heig 1 20 Aug 2014, 00:00
If the blades of a windmill are 10 meters long each and the 1 18 Aug 2014, 00:43
1 36 men dig a trench 200 meters long, 3 meters wide and 2 1 14 Oct 2008, 09:33
2 excavators can dig a 10 meter trench in 50 minutes. How 6 16 Nov 2007, 13:36
If a continuous cable 10 meters long were marked off at 3 13 Nov 2005, 20:51
Display posts from previous: Sort by

# M20-03. If 2 excavators can dig a 10-meter long trench in 50

Moderators: Bunuel, WoundedTiger

 Powered by phpBB © phpBB Group and phpBB SEO 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®.