Water flows steadily through a horizontal pipeline that contracts from a wider to a narrower circular section.
a. (i) The diameter changes from 6cm to 4cm. If the average speed in the wider section is 2.0ms−1, calculate the speed in the narrower section.
b. (ii) Determine the volume of water that leaves the narrower section in 5min, expressing your answer first in m3 and then in litres.