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Mechanical Properties Of Fluids

Question
CBSEENPH11018940
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A garden sprinkler has 150 small holes, each of 2mm2 in area. If water is supplied at the rate of 0.3 liter/s, then find the average velocity of spray.

Solution
Number of holes in the sprinkler, n=150
Area of each hole, a = 2mm2 = 0.02 cm2 
Total area of 150 holes,
A=150 X 0.02 = 3 cm2 
Rate of flow of water,
V=0.3  liter/s = 300 cc/s
By equation of continuity,
                  V = av
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