Suppose there is an outlet which is pouring water at a constant rate and is able to fill a swimming pool in nine hours. There is another outlet that is able to fill the pool in five hours. If we open both the outlets and let them pour the water together How many hours will it take to fill the pool ? Choose the correct choice from the following answers.
A) 3.11 hours B) 2.21 hours C) 3.21 hours D) 4.21 hours E) 5.21 hours
total work=1/9+1/5=14/45 so reqired time=45/14   =3.21 hours   ANSWER:3.21 hours
<result>C</result>
Suppose there is an outlet which is pouring water at a constant rate and is able to fill a swimming pool in nine hours. There is another outlet that is able to fill the pool in five hours. If we open both the outlets and let them pour the water together How many hours will it take to fill the pool ?