One section of a pipe carrying water has a cross-sectional area of 16 cm2; in this section the water has flow velocity of 1.0 m/
s. Another section of this pipe has a constricted cross-sectional area of 4 cm2. If the flow is steady, what is the water velocity in the constricted section? (a) 4.0 m/s
(b) 2.0 m/s
(c) 1.0 m/s
(d) 0.50 m/s
(e) 0.25 m/s.
A = 15, B = 1 48 + 15 = 63 for the first 86km 43 - 1 = 42 for the remaining 54 km time = distance/speed t1 = 86/63 = 1.3651hours t2 = 54/42 = 1.2857hours speed = distance/time s = 140/2.6508 average speed = 52.8km/h