Sections $1$ and $2$ are at the beginning and end of the bend of the $200$ mm

diameter pipe in which the quantity of flow is $0\mathrm{.}28$ m$3$

$/$s$.$ The angle of

deflection of the water is $40.$ Calculate the force that the liquid exerts

on the bend if the pressure in the pipe is $50$ kPa. Assume no loss of

pressure round the bend.