Ask questions and get helpful answers.

Three water pipes are used to fill a swimming pool. The 1st pipe alone takes 8 hours to fill the pool, the 2nd pipe alone takes 12 hours to fill the pool, and the 3rd pipe takes 24 hours to fill the pool. If all 3 pipes are opened at the same time, how long will it take all 3 together to fill the pool?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩

2 answers

  1. rates of each of the pipes are 1/8 pools per hour, 1/12 pools per hour, and 24 pools per hour.
    the combined rate would be
    (1/8 + 1/12 + 1/24) pools per hour
    = 1/4 units per hour

    Time using combined rate = 1 pool/(1 pool/4) hours
    = 4 hours

    (the "pool" unit canceled)

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. a large pipe can empty a pool in 6hours and a smaller pipe can empty the same pool in 9 hours. how long will it take both pipes to empty the pool.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Answer this Question

Related Questions

Still need help?

You can ask a new question or browse existing questions.