Calculate the depth of a well if the pressure at its bottom is 15 times that at a depth of 3 metres. Atmospheric pressure is 10 m column of water.

Explanation

Let the depth of the well be h then according to the question
`P_(atm)+ h rho_(w)g=15(P_(atm)+3rho_(w)g)`
`h p_(w)g=14P_(atm)+45rho_(w)g=14(10xxrho_(w)g)+45rho_(w)g`
`h=185m`