Water flows through a pipe. The radius of the pipe in the narrow part is .2m and the radius of the pipe in the wider part is .4m. The pressure in the narrow part is 2 x 10^5 Pa and the speed of water in the narrow part is 0.5m/s. The density of water is 1000 kg/m^3.
a. find the velocity of water in the wider part.
b. find the pressure in the wider part.