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GMAT Club World Cup 2026 (Day 2): A delivery van has a mileage of 14

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onlyPlanA

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07 Jul 2026, 09:59

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Given that, after installing the fuel-saving system, 70% fuel will be used. So, 30% is saved.
Thus, amount of fuel saved in gallons = (0.3 * 5120) / 128 = 12 gallons

Milega of the van = 14 miles/gallon.

So, the distance it could have covered with those 12 gallons = 14 * 12 = 168
A is the answer, IMO.

Sumimasen

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Total fuel in gallon = 5120/128 = 40 gallons
Without fuel saving system, van will travel 14miles/gallon. So, total distance with 40 gallons = 14*40 = 560 miles.
With fuel saving system, 14 mile will be covered in 70% of gallon which is 14/0.7 = 20miles/gallon. So, total distance will be 20*40 = 800 miles.

Hence extra distance van can travel with fuel saving system is 240 miles.

Bunuel

A delivery van has a mileage of 14 miles per gallon. After a fuel-saving system is installed, the van will use only 70% as much fuel as it used before to travel the same distance. If the van’s fuel tank holds 5,120 ounces of fuel, how many more miles can the van travel on a full tank after the system is installed? (1 gallon = 128 ounces)

A. 168
B. 224
C. 240
D. 560
E. 800

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dhart

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07 Jul 2026, 10:04

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128 ounce - 70% is 89.4 ounce divided by 14 = 6.4 ounce for 1 mile , 30% 38.4 ounce /6.4 = 6 mile extra for 1 gallon , for 5120/128 = 40 gallons -> 40*6= 240 miles Ans> C

GoodKey

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07 Jul 2026, 10:12

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If at 100% capacity the mileage is 14mpg=d/f, we can further calculate that after the improvement the mileage will be d/0.7f which is 20mpg.

5120 ounces becomes 40 gallons with the given information.

Miles at 14mpg = 14x40 = 560miles
Miles at 20mpg = 20x40 = 800miles

Difference between the two comes out to 240miles, option C.

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07 Jul 2026, 10:20

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Answer is C.
old milage: 1ga/14mi
new milage: 0.7ga/14mi = 1ga/20mi
5120 ounces = 5120/128 ga = 40ga
extra distance = 40(20-14) = 240mi.

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Bunuel

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1 gallon --- 14 miles

After fuel saving system

0.7 gallon --- 14 miles

1 gallon ----- 14/0.7 = 20 miles

So per gallon the van travels 6 miles extra

5120 ounces of fuel = 5120/128 = 40 gallon

Extra miles = 6 * 40 = 240

Option C

shivani1351

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07 Jul 2026, 10:39

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Before the fuel-saving system is installed:
Mileage = 14 miles/gallon

After the fuel-saving system is installed, since the van will use 70% as much as fuel as earlier:
New Mileage = 14 miles/0.7gallons = 20 miles/gallon

Volume of the fuel tank = 5120 ounces = 1/128 * 5120 = 40 gallons
Number of miles the van travels before the system is installed = 14*40 miles = 560 miles
Now, the number of miles the van will travel = 20*40 miles = 800 miles

Thus, the required answer = 800 - 560 = 240 miles

Hence, the correct answer is Option C - 240.

Hope this helps!

Vivek1707

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07 Jul 2026, 10:49

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Convert the tanks capacity into gallons.

Since 1 gallon is 128 ounces.

5120/128 = 40 gallons ---> total capacity in gallons.

So at the current mileage the van can travel 40 x 14 which is 560 miles.

Now, since the fuel efficieincy of the van increases it uses only 70% as much fuel meaning if earlier it was travelling 14 miles in 1 gallon; now it will travel 14 miles in 0.7 gallons.

Hence, the total distance it can travel now = 14/0.7 * 40 which is 800

So the additional number of miles it will travel is 800-560 which is 240 i.e Answer is D

Bunuel

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okHedwig

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07 Jul 2026, 10:52

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IMO A
5120 ounces = 5120/128 gallon = 40 gallon
Early fuel system , distnace travelled = 14x40 miles
After new system, same distance is travelled in 70% of 40gallon, or 28 gallon
Remaining fuel = 40-28 = 12gallon
So, extra distance travelled = 12 x 14 miles = 168
Hope this helps!

Bunuel

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07 Jul 2026, 10:53

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The fuel tank holds 5120 / 128 = 40 gallons.

Using the old fuel system, the van travelled --> 40*14 = 560 miles.

After the new system was installed, the van used 70% as much fuel for the same distance, which makes the new mileage as ---> 14/0.7 = 20 mpg

Total miles travelled post new system --> 40*20= 800 miles

Additional distance = 800 - 560 = 240 miles

Answer: C. 240

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07 Jul 2026, 11:03

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70 % = 9.8m/g
5120 ounces = 5120/128=40g
Before it was 40x14=560
After it is 560/0.7=800
Saving= 800-560=240 more
Answer C

jainsi

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Before: 14miles in 1gallon
After (70% fuel used): 14miles in 0.7gallon, which means 20 miles in 1 gallon.

After minus before = 6miles per gallon.

Tank Capacity = 5120/128 = 40 Gallons

Total Increased distance = 40*6= 240miles

Bunuel

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LibrarianTurtle

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07 Jul 2026, 11:07

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5,120 ounces = 40 gallon
Rate of delivery van is 14 miles per gallon
After the installation of the new fuel-saving system rate of delivery van becomes = 14 miles per .7 gallon or 20 miles per gallon
Without fuel-saving system van goes 560 miles
With fuel-saving system van goes 800 miles
800-560=240

nikhilphulwari

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07 Jul 2026, 11:10

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Given that Van travels:
1g -> 14miles
After the new system, it takes 70% fuel to travel the same distance; therefore,
0.7g->14miles, so 1g->20miles

total fuel tank capacity = 40g (5120/128)

total miles it can travel = 20*40= 800 miles

Zeus_

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07 Jul 2026, 11:16

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I think the answer is C.

5120 ounces = 40 gallons.

Original trip distance = 14 x 40 = 560 miles

New mileage trip = 14miles/0.7 gallon = 20 miles/gallon
New trip distance = 20 x 40 = 800 gallons.

800 - 560 = 240 more miles

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07 Jul 2026, 11:18

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Alright, how i went about was a bit long. So I converted 5120 ounces into gallons which comes about 40 once divided by 128, mileage is 14 gallons per mile, hence 560 is original. Once you do 70 percent, meaning 40, remove 12 as 30 percentage, you finished the entire distance in 28 gallons. Now divide 560 by 28 you will get the mileage as 20, now use 20 to multiply by 12. You will easily get 240 as additional miles driven, C which is our answer in this question.

ischiragkapoor

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07 Jul 2026, 11:22

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Milage = 14 miles / 1gallon
new mileage = 14 miles / 0.7 gallon = 20 miles/gallon
5120 Ou tank capacity
1 g = 128 Ou ==> 4 g = 512 Ou ==> 40 g = 5120 Ou

So tank capacity = 40g

Mileage = 40 g x 20 m/g = 800 miles

Correct Choice (E) 800 Miles

Nsanghavi

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07 Jul 2026, 11:33

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It is given that 1 G (gallon) = 128 ounces
Now, the tank holds 5,120 ounces of fuel when full i.e. = 5,120/128 = 40 G
Mileage before fuel saving system installation = 14 miles/G
Mileage after fuel saving system installation = 14/0.7 = 20 Miles/G (This is derived from the line " After a fuel-saving system is installed, the van will use only 70% as much fuel as it used before to travel to the same distance.)
Accordingly, extra miles due to fuel saving systme = 20-14 = 6 Miles/G
Total gallons on full tank = 40 G
Total additional distance = 40G * 6 = 240 -> Option C

stuPaula3925

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07 Jul 2026, 11:41

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Here's how I thought:

Original fuel consuming rate = 14 miles per gallon. (meaning: a van consumes 1 gallon of fuel can travel 14 miles.)

fuel consuming rate after installed= 14 miles per gallon * 70% = 9.8 miles per gallon. (meaning: the van running the same distance consumes 1 gallon of fuel only travel 9.8 miles, which is less than the original consuming rate.)

total fuel quantity allow this van to consume = 5,120 ounces =5,120÷128 =40 gallons (meaning: there are 40 gallons of fuel in this van's fuel tank)
(∵1 gallon = 128 ounces, therefore ? gallon = 5,120 ounces. => ?= 40)

if the question simply states:
"A delivery van has a mileage of 14 miles per gallon.
If the van's fuel tank holds 5,120 ounces of fuel,
"how many miles can the van travel on a full tank?",
-> the answer will be 40 gallons * 14 miles per gallon = 560 miles.

But, the question adds a statement, which is "After a fuel-saving system is installed,
the van will use only 70% as much fuel as it used before to travel the same distance.",
and if the question asks "how many miles can the van travel on a full tank after the system is installed?",
then the answer is 40 gallons * (14 miles per gallon * 70%) = 40 gallons * 9.8 miles per gallon = 392 miles.

However, the question wants to know "how many more miles can the van travel after the system installed?",
the answer is: 560 miles - 392 miles = 168 miles.

So, the answer is → A. 168.

Bunuel

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FreshStove

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07 Jul 2026, 11:55

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Earlier, 14 miles in 1 gallon. Now 0.7g will cover 14 miles, so 1 g will cover 14/0.7 = 20 miles.

5120 ounces is equivalent to 40 gallons (5120/128).
Additional = 6 miles per gallon * 40 gallons = 240 (Ans)