state gov Lekha Koshagar (कनिष्ठ लेखापाल) Bharati Mock Test 2025 Quantitative Aptitude Time and Work Pipe and Cistern
‘A’ pipe can empty a tank in 20 minutes. The second pipe ‘B’ has a diameter twice as that of ‘A’. If both A & B pipe are attached to the tank how much time will be required to empty the tank?
1
\(10\frac{1}{2} \) minutes
2
25 minutes
3
15 minutes
4
4 minutes