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# Brand X Brand Y Miles per gallon 40 36 Cost per gallon $0.80  Question banks Downloads My Bookmarks Reviews Important topics Author Message TAGS: Manager Joined: 30 Mar 2007 Posts: 183 Followers: 1 Kudos [?]: 14 [0], given: 0 Brand X Brand Y Miles per gallon 40 36 Cost per gallon$0.80 [#permalink]  17 May 2007, 06:57
Brand X Brand Y
Miles per gallon 40 36
Cost per gallon $0.80$0.75

The table above gives the gasoline costs and consumption rates for a certain driven at 50 miles per hour, using each of two brands of gasloine. How many miles further can the car be driven at this speed on $12 worth of brand X gasoline than on$12 worth of brand Y gasoline?

A. 20
B. 24
C. 84
D. 100
E. 104 [/u]
Manager
Joined: 02 May 2007
Posts: 152
Followers: 1

Kudos [?]: 5 [0], given: 0

Re: prep question [#permalink]  17 May 2007, 07:12
Jamesk486 wrote:
Brand X Brand Y
Miles per gallon 40 36
Cost per gallon $0.80$0.75

The table above gives the gasoline costs and consumption rates for a certain driven at 50 miles per hour, using each of two brands of gasloine. How many miles further can the car be driven at this speed on $12 worth of brand X gasoline than on$12 worth of brand Y gasoline?

A. 20
B. 24
C. 84
D. 100
E. 104 [/u]

(B) it is

(12/0.8)*40 - (12/0.75)*36 = 24
Senior Manager
Joined: 03 May 2007
Posts: 272
Followers: 1

Kudos [?]: 8 [0], given: 0

Re: prep question [#permalink]  17 May 2007, 07:13
Jamesk486 wrote:
Brand X Brand Y
Miles per gallon 40 36
Cost per gallon $0.80$0.75

The table above gives the gasoline costs and consumption rates for a certain driven at 50 miles per hour, using each of two brands of gasloine. How many miles further can the car be driven at this speed on $12 worth of brand X gasoline than on$12 worth of brand Y gasoline?

A. 20
B. 24
C. 84
D. 100
E. 104 [/u]

first we need to find out how many gallons of each brand we can buy
12/0.8=15gallons of X and 12/0.75=16gallons of Y
second the distance we can go
15*40=600 for X and 16*36=576 for Y
the difference is 600-576=24

Re: prep question   [#permalink] 17 May 2007, 07:13
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