In estimation of quantity of plastering work for a wall with two openings of size 0.4 m2 and 0.3 m2 area the quantity of deduction allowed is:
1
deduction of 0.7 m2 is allowed for one face area of the wall
2
deduction of 0.7 m2 is allowed for both face areas of the wall
3
No deduction is allowed from the both face areas of the wall
4
deduction of 0.35 m2 is allowed for one face area of the wall