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5) A water tank has a hole at a distance of 5 m fromfree water surface. Find the velocity of waterthrough the hole. If the radius of the hole is 2 mmwhat is the rate of flow of water? (g 9.8 m/s)Data : h 5m, r 2 x 10 3m, g 9.8 m/sSolution:2

Answer»

Velocity of the water = √2gh = √2*9.8*5 = √98 = 7√2m/s

now when radius of hole = 2mm A = π(0.002)² m²

rate of flow Q = A.v = π *4*7√2 × 10^-6 = 0.000124 m³/s = 1.24 × 10-⁴ m³/s



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