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A taxi company charges f cents for the fi rst mile of the

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Manager
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Joined: 10 Nov 2010
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Concentration: Strategy, Operations
GMAT 1: 520 Q42 V19
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A taxi company charges f cents for the fi rst mile of the  [#permalink]

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New post 04 Jul 2011, 22:48
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

36% (00:45) correct 64% (00:52) wrong based on 14 sessions

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54. A taxi company charges f cents for the fi rst mile of the
taxi ride and m cents for each additional mile. How
much does the company charge for a 10-mile taxi
ride?
(1) The company charges $0.90 for a 2-mile ride.
(2) The company charges $1.20 for a 4-mile ride.

answer
Price of first mile= f
Price of extra mile =m

f+9m=?

1) f+m = 0.90 NS
2) f+3m = 1.20 NS

1+2) from two simultaneous equations we can calculate both f and m

C

Now Similar type of question in Quant Review 11 edition

104 ) A bookstore that sells used books sells each of its paperback books for a certain price and each of its hardcore certain price.If Joe, Maria and Paul bought books in this store, how much did Maria pay for 1paperback book and 1 hardcover book?

1) Joe bought 2 paper book books and 3 hardcover books for $12.50
2) Paul bought 4 paperback books and 6 hardcover books for $25.00

Answer
Price per paperback book- p
Price per Hardcover book- h
p+h =?

1) 2p+3h = 12.50 NS
2) 4p+6h = 25.00 NS

1+2) From two simultaneous equations we can calculate both p and h

But OA for dis question is not C

Guys Need help on this one

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Re: Dont the concept same for both word Problems  [#permalink]

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New post 05 Jul 2011, 00:24
GMATD11 wrote:
1) 2p+3h = 12.50 NS
2) 4p+6h = 25.00 NS


Look carefully at equation 2. Divide both sides by 2, you will get
2p+3h=12.5 which is same as equation 1. hence you just have one equation with two variables that cannot be solved.
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Re: Dont the concept same for both word Problems  [#permalink]

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New post 05 Jul 2011, 02:53
Also seems to be a common "trick" the GMAT loves under different guises worth watching out for - two equations, two unkowns, but not solvable

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Re: A taxi company charges f cents for the fi rst mile of the  [#permalink]

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New post 11 Sep 2017, 10:35
Hi,
Can someone have a look at the first question please?The one about taxi.I couldn't understand how it is not solvable.
Thanks.
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Re: A taxi company charges f cents for the fi rst mile of the  [#permalink]

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New post 11 Sep 2017, 11:10
deucebigalow wrote:
Hi,
Can someone have a look at the first question please?The one about taxi.I couldn't understand how it is not solvable.
Thanks.


First question: a-taxi-company-charges-f-cents-for-the-first-mile-of-the-139875.html
Second question: a-bookstore-that-sells-used-books-sells-each-of-its-paperbac-167844.html

Topic is locked and archived.

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Re: A taxi company charges f cents for the fi rst mile of the &nbs [#permalink] 11 Sep 2017, 11:10
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