The Water Supply to an Old Suburb in Perth Is

Multiple Choice

The water supply to an old suburb in Perth is no longer adequate, and the water company is planning to put in a higher capacity supply. Which of the following options would give the biggest increase in the water flow into the suburb?

A) Re-route the water supply pipeline to a new route that is 13% shorter.
B) Dig up the water supply pipeline and replace it with one that has a 10% larger diameter.
C) Replace the pumps with ones that provide a 15% larger pressure difference.
D) Replace the buried water supply pipeline with one that is on the surface and hence exposed to the sun. The heat from the sun will warm the water and hence reduce its viscosity by around 7%.
E) All the other solutions will have the same results.ANS