Tough and Tricky questions: Work/Rate Problems.
A group of 4 junior lawyers require 7 hours to complete a legal research assignment. How many hours would it take a group of three legal assistants to complete the same research assignment assuming that a legal assistant works at two-thirds the rate of a junior lawyer?
Source: Chili Hot GMAT
Choose the most appropriate option:
A) 14
B) 10
C) 9
D) 6
E) 5
# of people times the # of hours:   4*7= 
<gadget id="calculator">4*7</gadget>
<output>28</output>
28 --&gt; 4 lawyers do 28 worksin 7 hours.   3*14/3= 
<gadget id="calculator">3*14/3</gadget>
<output>14</output>
14 --&gt; 3 assistants do 14worksin 4 hours   So, since the amount of work the assistants do is half the work the lawyers do, the time will be double, so14NS 14
<result>A</result>
Tough and Tricky questions: Work/Rate Problems.
A group of 4 junior lawyers require 7 hours to complete a legal research assignment. How many hours would it take a group of three legal assistants to complete the same research assignment assuming that a legal assistant works at two-thirds the rate of a junior lawyer?
Source: Chili Hot GMAT