When a sudden contraction is introduced in a horizontal pipeline from 0.5 m diameter to 0.25 m diameter, the pressure changes from 105 kPa to 69 kPa. If the coefficient of contraction is 0.65, then...

When a sudden contraction is introduced in a horizontal pipeline from 0.5 m diameter to 0.25 m diameter, the pressure changes from 105 kPa to 69 kPa. If the coefficient of contraction is 0.65, then find the water flow rate. Following this if there is a sudden enlargement from 0.25 m to 0.5 m and if the pressure at the 0.25 m section is 69 kPa, then what is the pressure at the 0.5 m enlarged portion?