Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm diameter is

Question

Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm diameter is, 4 times that in the other pipe, 1 4 times that in the other pipe, 2 times that in the other pipe, 1 2 times that in the other pipe

MARKS App · Accepted Answer

Given, d A = 2 cm and d B = 4 cm ∴ r A = 1 cm and r B = 2 cm From the equation of continuity a v = constant ∴ V A V B = a B a A = π ( r B ) 2 π ( r A ) 2 = 2 1 2 ⇒ V A = 4 V B

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