A truck owner will refuel his vehicle at a rate of 2 gallons of diesel

Question

A truck owner will refuel his vehicle at a rate of 2 gallons of diesel fuel every 5 seconds. If diesel fuel costs $ 1.25 per gallon, how long will it take for the truck owner to refuel his vehicle with $ 40 worth of diesel fuel?

2 gal / 5 sec
$1.25 / gal

$40/$1.25 = 32 gal

2 gal / 5 sec with 32 gal = 80 sec

C. 1 minute 20 seconds

A. 20 seconds
B. 1 minute 
C. 1 minute 20 seconds 
D. 20 minutes 
E. 1 hour 20 minutes

peachfuzz · Answer

A truck owner will refuel his vehicle at a rate of 2 gallons of diesel fuel every 5 seconds. If diesel fuel costs $ 1.25 per gallon, how long will it take for the truck owner to refuel his vehicle with $ 40 worth of diesel fuel?

2 gal / 5 sec
$1.25 / gal

$40/$1.25 = 32 gal

2 gal / 5 sec with 32 gal = 80 sec

C. 1 minute 20 seconds

2 gal / 5 sec
$1.25 / gal

$40/$1.25 = 32 gal

2 gal / 5 sec with 32 gal = 80 sec

C. 1 minute 20 seconds

nipunjain14 · Answer

No. of gallons = 40 / 1.25 = 32
 for 2 gallons it takes 5 secs
for 32 gallons it will take 80 secs = 1 min and 20 secs

Ans; C

EMPOWERgmatRichC · Answer

Hi All,

This question is essentially one big 'rate' question, but there is an intermediate step that you can take, when solving it, to make the work a little easier to complete. Sometimes a Quant question includes an 'ugly' number that can be 'cleaned up' and made easier to deal with (IF you do a little bit of work to purposely clean it up)...

We're told that a truck owner will refuel his vehicle at a rate of 2 gallons of diesel fuel every 5 seconds and that diesel fuel costs $ 1.25 per gallon. We're asked how long will it take for the truck owner to refuel his vehicle with $40 worth of diesel fuel.

The 'ugly' number in this question is $1.25 per gallon....

1 gallon = $1.25

If we multiply both sides of that equation by 4, we can eliminate the decimal point....

4 gallons = $5.00

Now, it isn't nearly so much work to figure out how many gallons we can buy for $40...

$5 = 4 gallons
$40 = (8)($5) = (8)(4 gallons) = 32 gallons

2 gallons every 5 seconds....
32 gallons = 16(2 gallons) = 16(5 seconds) = 80 seconds.

Final Answer:  C

GMAT assassins aren't born, they're made,
Rich

A truck owner will refuel his vehicle at a rate of 2 gallons of diesel

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A truck owner will refuel his vehicle at a rate of 2 gallons of diesel

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