alleryTwo pipes fill in 20 and 24 minutes; a waste pipe empties 3 gal/min. All three together fill in 15 min. Capacity:
A60 Gallons
B100 Gallons
C120 Gallons
D180 Gallons
Answer & Solution
Correct answer: C. 120 Gallons
1. Let capacity be V. Fill rates: V/20 + V/24 − 3 = V/15.
2. Common denom 120: 6V/120 + 5V/120 − 360/120 = 8V/120 → 11V − 360 = 8V → 3V = 360.
3. V = 120 gallons.
_Source: KMAT Karnataka 2023 PYQ Q.43_
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