Obtain an expression for the excess of pressure inside a liquid drop.

A cylinder of length$1.5 \mathrm{m}$and diameter$4 \mathrm{cm}$is fixed at one end. A tangential force of $4 \times {10}^5 \mathrm{N}$ is applied at the other end. If the rigidity modulus of the cylinder is $6 \times {10}^{10} \mathrm{N}/{\mathrm{m}}^2$ then, calculate the twist produced in the cylinder.

(Approximate the answer to two decimal place)