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If a certain city is losing 12 percent of its daily water supply each

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Bunuel
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If a certain city is losing 12 percent of its daily water supply each [#permalink] New post  16 Dec 2014, 05:24
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If a certain city is losing 12 percent of its daily water supply each day because of water-main breaks, what is the dollar cost to the city per day for this loss?

(1) The city’s daily water supply is 350 million gallons.
(2) The cost to the city for each 12,000 gallons of water lost is $2.
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omegacube
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Re: If a certain city is losing 12 percent of its daily water supply each [#permalink] New post  16 Dec 2014, 05:31
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Kudos
We need to know the amount of water loss per day AND the cost per gallon of water loss to calculate the total loss per day. This can be inferred from both the statements together, and NOT by either of them alone.

Hence C
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g106
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Re: If a certain city is losing 12 percent of its daily water supply each [#permalink] New post  16 Dec 2014, 23:11
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Kudos
Bunuel wrote:

Tough and Tricky questions: Word Problems.



If a certain city is losing 12 percent of its daily water supply each day because of water-main breaks, what is the dollar cost to the city per day for this loss?

(1) The city’s daily water supply is 350 million gallons.
(2) The cost to the city for each 12,000 gallons of water lost is $2.

Kudos for a correct solution.



Need to find the cost for 12% of the water loss
1: Insufficient - WE can find the amount of water loss but not cost
2: In sufficient - Cost of gallon of water can be calculated but not the loss of water

combining both we can find the total cost for lost water

ANS C
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Glen123
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Re: If a certain city is losing 12 percent of its daily water supply each [#permalink] New post  01 Jan 2015, 22:25
I also vote for C. It really kinda tough and tricky question but not much :)
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love004nit@gmail.com
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Re: If a certain city is losing 12 percent of its daily water supply each [#permalink] New post  06 Jan 2017, 10:09
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Kudos
Option 1 - Not sufficient. No info about cost
Daily Supply = 350 gallons
Daily Water Lost = (.12)350 = 42 gallons
Option 2 - Not sufficient. We don't know how much days' supply sums up to this. Weekly? Monthly?
Cost for 12000 gallons = $2
Cost for 1 gallon = $(1/6000)

Together
Total loss = Amount lost * Cost of each gallon
= 42 * 1/6000
= .007 $ per day
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practica
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Re: If a certain city is losing 12 percent of its daily water supply each [#permalink] New post  13 Feb 2019, 22:45
love004nit@gmail.com wrote:
Option 1 - Not sufficient. No info about cost
Daily Supply = 350 gallons
Daily Water Lost = (.12)350 = 42 gallons
Option 2 - Not sufficient. We don't know how much days' supply sums up to this. Weekly? Monthly?
Cost for 12000 gallons = $2
Cost for 1 gallon = $(1/6000)

Together
Total loss = Amount lost * Cost of each gallon
= 42 * 1/6000
= .007 $ per day


I think the right amount is 42 million gallons instead of 42 gallons?
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Re: If a certain city is losing 12 percent of its daily water supply each [#permalink] New post  08 Oct 2020, 03:24
OFFICIAL GMAT EXPLANATION

In order to solve this problem, the cost of the water and the number of gallons in the daily water supply must be known. Statement (1) gives the daily water supply, which is not sufficient by itself, and statement (2) gives the cost of water, which also is not sufficient by itself. Thus, the answer must be C or E. From both statements together, it can be concluded that the dollar cost for the water lost is (0.12(350,000,000) x $2)/12,000. The best answer is C.
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Re: If a certain city is losing 12 percent of its daily water supply each [#permalink]
08 Oct 2020, 03:24
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