A fish is swimming 15 m below the surface of a lake
The density of the water is 1000 kg /m3
.
Atmospheric pressure is 100 000Pa.
The acceleration of free fall g is 10 m / s2
.
What is the total pressure on the fish?
A 50 000Pa
B 120 000Pa
C 150 000Pa
D 250 000Pa

the answer is D but i need a proper explanation too.