Question 7.Q.5: Water flows in a pipe of 23-cm diameter with an average velo......
Water flows in a pipe of 23-cm diameter with an average velocity of 0.73 m/s, the diameter of the pipe is reduced, and the average velocity of the water increases to 1.66 m/s. What is the diameter of the smaller pipe? What is the flow rate?
Step-by-Step
Q=\frac{0.73\times 3.14\times 23\times 23}{4\times 100\times 100} \ m^{3}/s=0.03 \ m^{3}/s=30 \ L/s \\ d=\sqrt{\frac{0.03\times 4}{3.14\times 1.66}} \ m=0.152 \ m=15.2 \ cm
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