What is the correct Douma’s equation for rectangular tunnels or con – McqOptions

MCQOPTIONS

1.	What is the correct Douma’s equation for rectangular tunnels or conduits?
A.	X2 + 10.4 Y2 = d2
B.	4X2 + 10.4 Y2 = d2
C.	4X2 + 44.4 Y2 = d2
D.	X2 – 10.4 Y2 = d2
Answer» B. 4X2 + 10.4 Y2 = d2

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