defence exam Indian Navy Fireman/Fire Engine Driver Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
A tank is attached to 16 pipes, some of them are filling pipes and the remaining are emptying pipes. Each of the filling pipes can fill a tank in 8 hours and each of the emptying pipes can empty a full tank in 10 hours. When the tank is 65% empty, all the pipes are opened at the same time. It takes one hour to fill the tank completely. How many pipes are emptying pipes?
1
5
2
8
3
4
4
6