Deepest
part of the swimming pool = 12 feet deep
Shallowest part of the swimming pool = 3 feet deep
Thus the ratio of both swimming pool depth is:
=> 12 : 3
12 – 3 = 9
The deepest part of swimming pool is 9 feet deeper compare to the shallowest
part of the swimming pool.
Ratio is simply mean the number of x is to the number of y
=> x : y