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# The diameter of a main pipe is 30 cm and it branches into two pipes | Civil UPSC ESE Exam Solution 2021

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## Civil UPSC ESE Exam Solution 2021

UPSC ESE Exam Solution 2021 for Civil Engineering UPSC ESE 2021 GS Paper 1 download exam paper from telegram https://telegram.me/civil_experiences

## Detailed Explanation

From the continuity equation

(Ï€D12/4)V1 = (Ï€D22/4)V(Ï€D32/4)V3

D12V1 = D22VD32V3

V= (D12V1 – D22V2)/D32 = (D1/D3)2 V1 – (D2/D3)2 V2

V= (30/15)2 Ã— 2.5 – (20/15)2 Ã— 2

V3 = 4 Ã— 2.5 – (4/2.25) Ã— 2 = 6.44 m/s

V3 = 6.44 m/s

 Civil UPSC ESE Exam Solution 2021
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