Question

The depth (in nearest multiple of 10) in m, under the sea, that one must reach for the magnitude of difference in pressure between the inside and outside of a submarine to be the same as that experienced between the inside and outside of a manned spacecraft out in space, is________ m.

Answer 1

what a easy question you have asked
actually i didnot know the ans please say it on comment section

Answer 2

The pressure gradient produced by every metre one goes down under the sea surface is much higher than the pressure gradient a spaceship faces when it goes out in space.

For each metre one goes down under the sea surface, there is a rise of 1 atmosphere pressure, so at a depth of 10,000 m, the pressure is 10000 atmosphere.

To compare, the pressure produced in outer space is around 90 atmosphere in a planet as distant as the Venus.