The swimming pool at perris hill plunge is 50 feet long and 25 feet wide. if the bottom of the pool is slanted so that the water depth is 3 feet at the shallow end and 15 feet at the deep end,the angle of elevation at the bottom of the pool is calculated by
Over a 50 foot (surface) length, there is a 12 foot (vertical) drop.
tan A = 12/50 = 0.24
A = 13.5 degrees