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If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days

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Bunuel
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If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days [#permalink] New post   25 Dec 2020, 10:00
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If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days, how many gallons will be used by four taxi cabs during a 7-day week?

(A) 180
(B) 240
(C) 300
(D) 360
(E) 420
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D
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Re: If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days [#permalink] New post   25 Dec 2020, 10:56
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Asked: If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days, how many gallons will be used by four taxi cabs during a 7-day week?

7*2 = 14 taxicab-days require = 180 gallons of gasoline
4*7 = 28 taxicab-days will require = 180*28/14 = 360 gallons of gasoline

IMO D
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If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days [#permalink] New post   25 Dec 2020, 11:23
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7 taxis at 180 gal / 2 days
7 taxis at 90 gal / 2 days
1 taxi at ~13 gal / day

Therefore, 4 taxi @ ~52 gal / day
4 taxi at < 364 gal / week.

D.
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Re: If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days [#permalink] New post   25 Dec 2020, 13:13
Given 7 taxi- 2 days = 180 gallons
now, 1 taxi- 1 day = 180/(2*7)

So, 4 taxi - 7 days = 180/(2*7) *4*7 = 360 gallons.

I think D. :)
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Re: If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days [#permalink] New post   27 Dec 2020, 19:31
If 7 taxis do 90 gallons/day, then:

90 gallons/day / 7 taxis = ~13 gallons per day / taxi

4 taxis x 13 gallons per day / taxi = 52 gallons per day

7 days x 52 gallons per day = ~360 gallons per week
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Re: If a fleet of seven taxicabs uses 180 gallons of gasoline every 2 days [#permalink]
27 Dec 2020, 19:31
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