First pipe can fill a tank in 12 hours. Second pipe can fill the same tank in 6 hours. Third pipe in 4 hours. How long will it take if all the 3 pipes are opened simultaneously?
1
2 hrs.
2
3 hrs.
3
4 hrs.
4
12 hrs.
First pipe can fill a tank in 12 hours. Second pipe can fill the same tank in 6 hours. Third pipe in 4 hours. How long will it take if all the 3 pipes are opened simultaneously?