*/*_If a is the offset of concrete bed in cms, and d is the depth of concrete bed in cms, then?

*/*_If a is the offset of concrete bed in cms, and d is the depth of c

1.	/_If a is the offset of concrete bed in cms, and d is the depth of concrete bed in cms, then?
A.	d = 0.445 a
B.	d = 0.557 a
C.	d = 0.775 a
D.	None of these
Answer» D. None of these