other govt exam India Post Postman & Mail Guard Mock Test 2020 Quantitative Aptitude Time and Work Pipe and Cistern
A water tank has two holes. The 1st hole alone empties the tank in 8 minutes and 2nd hole alone empties the tank in 12 minutes. If water leaks out at a constant rate, how many minutes will it take, if both the holes together empty the tank?
1
\(\dfrac{4}{5}\)
2
\(4 \dfrac{4}{5}\)
3
\(4\dfrac{3}{5}\)
4
\(4\dfrac{2}{5}\)