An engine used up fuel

[nirbhik.modi87]

#2. An engine used up fuel at a constant rate
until it ran out of fuel. At what time did the
engine run out of fuel?

(1) At 1:00 P.M., the engine had 2/3 more
fuel than it had at 5:00 P.M.

(2) At 1:00 P.M., the engine had 6 more
liters of fuel than it had at 5:00 P.M

Source: Question # 2 , MGMAT Class Handout # Session 2.

I am not able to understand why is 2 insufficient.

For option 1, I just assumed a random amout of fuel. And I tried using the same strategy for 2'nd question. I am confused with the explanation provided in handout.

if possible please explain in more simpler terms.

Thanks,
Nirbhik Modi

[RonPurewal]

Hello,
If this question is from MGMAT class materials, please re-post it in the MGMAT non-CAT math folder.

Thanks.