CUET · MATHS · PYQ PAPER 2025
Two pipes can fill a tank in 6 minutes and 12 minutes respectively, and a third pipe can empty the tank at the rate of 18 liters per minute. If all the pipes working together can fill the empty tank in 5 minutes, the capacity of the tank is:
- A 600 litres
- B 480 litres
- C 360 litres
- D 630 litres
Answer & Solution
Correct Answer
(C) 360 litres
Step-by-step Solution
Detailed explanation
\( \frac{1}{6} + \frac{1}{12} - \frac{18}{V} = \frac{1}{5} \) \( \frac{2+1}{12} - \frac{18}{V} = \frac{1}{5} \) \( \frac{1}{4} - \frac{18}{V} = \frac{1}{5} \) \( \frac{18}{V} = \frac{1}{4} - \frac{1}{5} = \frac{5-4}{20} = \frac{1}{20} \) \( V = 18 \times 20 = 360 \) litres
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