There are three pipes in the pool. With the first pipe, the pool can be filled in 10 hours, with the second pipe, in 8 hours

There are three pipes in the pool. With the first pipe, the pool can be filled in 10 hours, with the second pipe, in 8 hours, with the third pipe, all the water from the filled pool can pour out in 5 hours. Which part of the pool will be filled in 1 hour . if all three pipes are open?

1 turbine fills 1/10 of water per hour
1/8 of water per hour is filled by 2 turbines
1/5 of water per hour is released by 3 turbines
1/10 + 1 / 8-1 / 5 = 4/40 + 5 / 40-8 / 40 = 9 / 40-8 / 40 = 1/40-this part of the pool will be filled with water
Answer: 1/40 of the pool will be filled in 1 hour