Fuel tanker A can fill the underground reservoir in 12 minutes. How

Fuel tanker A can fill the underground reservoir in 12 minutes. How long will it take fuel tanker A and fuel tanker B to fill up the same reservoir together?

(1) The reservoir contains 3000 liters of fuel.
(2) Fuel tanker B alone will require the same number of hours to fill the same reservoir.

Statement 1) Does not specify the rate of Tanker B. Choice A) & C) ruled out.
Statement 2) Fuel tanker B fills the reservoir in the same no of hours as tanker A. (i assume the statement refers to Tanker A for comparison)
i.e A & B can independently fill the tanker in 12mins.
Together they will fill in 6mins.

Choice B) is correct. Statement 2) alone is sufficient to ans the question.

Good luck
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