$($b$)$ A $45$ reducing pipe$-$bend $($in a horizontal plane$)$ tapers from $600$ mm diameter at inlet to $300$

mm diameter at outlet $($see Figure below$).$ The gauge pressure at inlet is $140$ kPa and the rate of

flow of water through the bend is $0\mathrm{.}425\frac{m^3}{s}.$ Neglecting friction, calculate the net resultant force

exerted by the water on the bend.