By taking 3' off it
Add alot of iodine
Drain it.
One possibility is (21 - 21) * 13 + 24 = 24
24 foot round pool would be 24 feet across from the middle of the pool basically measure the diameter of the pool.
Add salt
Simply put any pool can be a salt water pool, even an above ground pool.
Average of 21, 24, 21 and 23 = (21+24+21+23)/4 = 22.25
21 24 means : The time is 21 ( p.m ) and 24 minutes .
yes, you can turn a pool into a giant hot tub.
21/24 and 20/24
24 what?
24