BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Rate tough questn

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Senior | Next Rank: 100 Posts
Posts: 74
Joined: Tue Nov 09, 2010 11:33 pm

Rate tough questn

by sukh » Fri Jul 15, 2011 8:50 am
In normal printing mode, 20 printers can print 100 pages in 3 minutes. In economy mode, printers work 20% faster than in normal mode. How many printers are required to print 180 pages in 3 minutes in economy mode? (A) 25 (B) 28 (C) 29 (D) 30 (E) 32
i calculated by MDH/W formula where m is men or printers d - days ( not applicable here ) H hours converted here into minutes W is the work done but my solution is wrong i dont know how to put 20 % faster thing in this formula
Top
Source: — Quantitative Reasoning |
Legendary Member
Posts: 1448
Joined: Tue May 17, 2011 9:55 am
Location: India
Thanked: 375 times
Followed by:53 members

by Frankenstein » Fri Jul 15, 2011 8:59 am
Hi,

Normal mode: 20 printers->100 pages => 1printer 5pages in 3 mins
Economy mode: 20% faster means each printer can print (1+(20/100)*5 = 6 pages in 3mins
So, number of printers required for 180 pages = 180/6 = 30

Hence, D
Cheers!

Things are not what they appear to be... nor are they otherwise
Top
Post new topic Post Reply
• Page 1 of 1