a) To fill a child's backyard inflatable wading pool you use a garden hose with a diameter of 2.9 cm. Water flows from this hose with a speed of 1.3 m/s. How long will it take to fill the pool to a depth of 29 cm if it is circular and has a diameter of 3.2 m?
b) If there is a section of the hose where the diameter decreases to 1.93 cm, what is the speed of the water in this section?