state gov Kolkata Police Constable Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes can fill a tank in 10 hrs and 20 hrs, respectively. How long will they take to fill up the tank, if they are used together?
1
6 hrs 35 min
2
6 hrs 30 min
3
6 hrs 40 min
4
6 hrs 45 min