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Apr 2808:00 AM PDT
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Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
10 Nov 2020, 03:30
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Difficulty:
55%
(hard)
Question Stats:
68% (03:06) correct
32%
(02:57)
wrong
based on 90
sessions
History
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Time
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Not Attempted Yet
A small company is planning to rent either computer A or computer B to print customer mailing lists. Both computer A and computer B must be rented on an hourly basis. The rental fee is based only on the amount of time the computer is turned on. It will cost 40 percent more per hour to rent computer A than to rent computer B. Computer B would, however, require 20 hours more than computer A to do the job. If either computer A, or computer B were rented the total cost to rent the computer would be $660.00. What would be the approximate hourly charge to rent computer B?
(A) $9.40
(B) $11.30
(C) $13.20
(D) $17.80
(E) $22.10
Are You Up For the Challenge: 700 Level Questions
(A) $9.40
(B) $11.30
(C) $13.20
(D) $17.80
(E) $22.10
Are You Up For the Challenge: 700 Level Questions
10 Nov 2020, 04:04
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Bunuel
Let the cost per hour to rent A and B be a and b respectively => a=1.4b, and
the time required by A and B be x and y respectively =>y=x+20
Cost for A = \(ax=1.4bx=660\)
Cost for B = \(by=b(x+20)=bx+20b=660\)
Firstly, since amount is same =>\(1.4bx=bx+20b........0.4bx=20b........x=50\)
Cost for A=\(1.4bx=1.4b*50=660.........7b=66<70\), so b<10..
Only $9.40 fits in.
We could also check by calculating b=66/7 = 9.43
