defence exam Indian Navy Tradesman Mate Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes are used to fill a tank. If one pipe can fill the tank at a speed of 1/5 of the tank in an hour and the other can fill the tank in 20 hours when working alone, in what time (in hours) will the two pipes working together fill the tank?
1
5 hours
2
4 hours
3
10 hours
4
20 hours