A submarine experiences a pressure of $5.05 \times 10 ^ { 6 } \mathrm {~Pa}$ at a depth of $\mathrm { d } _ { 1 }$ in a sea. When it goes further to a depth of $\mathrm { d } _ { 2 }$, it experiences a pressure of $8.08 \times 10 ^ { 6 } \mathrm {~Pa}$. Then $\mathrm { d } _ { 2 } - \mathrm { d } _ { 1 }$ is approximately (density of water $= 10 ^ { 3 } \mathrm {~kg} / \mathrm { m } ^ { 3 }$ and acceleration due to gravity $= 10 \mathrm {~ms} ^ { - 2 }$ ): (1) 600 m (2) 500 m (3) 300 m (4) 400 m
A submarine experiences a pressure of $5.05 \times 10 ^ { 6 } \mathrm {~Pa}$ at a depth of $\mathrm { d } _ { 1 }$ in a sea. When it goes further to a depth of $\mathrm { d } _ { 2 }$, it experiences a pressure of $8.08 \times 10 ^ { 6 } \mathrm {~Pa}$. Then $\mathrm { d } _ { 2 } - \mathrm { d } _ { 1 }$ is approximately (density of water $= 10 ^ { 3 } \mathrm {~kg} / \mathrm { m } ^ { 3 }$ and acceleration due to gravity $= 10 \mathrm {~ms} ^ { - 2 }$ ):\\
(1) 600 m\\
(2) 500 m\\
(3) 300 m\\
(4) 400 m