The formula recommended by the British code BS: 8110 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1985 for the estimation of surface crack width Wcr is:$

W cr = 3a cr ‚âà√≠¬¨¬µ m

Wcr = 3acr‚âà√≠¬¨¬µm / 1+2(acr ‚Äö√Ñ√∂‚àö√ë‚àö¬® Cmin/h-x)

Wcr = 3acr‚âà√≠¬¨¬µm

Wcr = 3acr‚âà√≠¬¨¬µm / 1+2(acr + Cmin/h-x)

Wcr = 5acr‚âà√≠¬¨¬µm

The formula recommended by the British code BS: 8110 ‚Äö√Ñ√�

1.	The formula recommended by the British code BS: 8110 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1985 for the estimation of surface crack width Wcr is:$
A.	W<sub>cr</sub> = 3a<sub>cr</sub>‚âà√≠¬¨¬µ<sub>m</sub> / 1+2(a<sub>cr</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® C<sub>min</sub>/h-x)
B.	W<sub>cr</sub> = 3a<sub>cr</sub>‚âà√≠¬¨¬µ<sub>m</sub>
C.	W<sub>cr</sub> = 3a<sub>cr</sub>‚âà√≠¬¨¬µ<sub>m</sub> / 1+2(a<sub>cr</sub> + C<sub>min</sub>/h-x)
D.	W<sub>cr</sub> = 5a<sub>cr</sub>‚âà√≠¬¨¬µ<sub>m </sub>
Answer» B. W<sub>cr</sub> = 3a<sub>cr</sub>‚âà√≠¬¨¬µ<sub>m</sub>