The swimming pool at the leisure centre has been closed for the past few weeks for maintenance and repair.
The pool is now repaired and is being re-filled.
The water flows through each of the pipes that fill the pool at the same rate.
It takes 4 of the pipes 12 hours to fill the pool.
Work out how many hours it would take 6 pipes to fill 1/4 of the pool.
Answer:
To start with we can find out how long it would take to fill the lake if there was only 1 pipe by doing:
12 x 4 = 48 hours
Then, we can work out how long it takes with 6 pipes by dividing the time it takes with 1 pipe by 6:
48/6 = 8 hours
But since the question only asks for the time to fill ¼ of the lake we can conclude it takes 2 hours with 6 pipes.