Calculate the number of liters per year of liquid that can be transported through the fol$-$

lowing pipe sizes, assuming a constant liquid velocity of $1\frac{m}{s}$ :

a$.3cm$ internal diameter.

b$.5cm$ internal diameter.

c$.25cm$ internal diameter.

d$.50cm$ internal diameter.

Comment on the magnitude of the result and the necessity for large pipe sizes in a chemi$-$

cal plant.