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Tank = 30x units
A = x, B = 2x, C = 0.5x
15 mins: (x - 0.5x) × 15 = 7.5x
Remaining = 30x - 7.5x = 22.5x
Net = 2x - 0.5x = 1.5x
Time = 22.5x / 1.5x = 15 minutes
Total time = 15 + 15 = 30 minutes
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Statements:
B ≥ L = C; N ≤ L < O; Q ≥ N < R
Conclusions:
I. B > N
II. N = B