Work out the quantities of the following items from given plan & section

(a) Excavation for foundation

(b) Brickwork (CM= 1:6) in superstructure of ground floor

(c) Concrete (M20) in footing

(d) 20 mm thick External plastering in CM 1:4 upto terrace level

Step 1:-

Total length $= .23*3+6.23*2+2.33*2+3.23*4+1.83+1.43+6.46*3+5.23*2+4.23 \\ = 80.06 m$

No of junction = 12

$\text{Trapezoidal portion} \\ V= \bigg(\dfrac{A1+A2}{2}\bigg) *H \\ = \bigg(\dfrac{0.38*0.38+1.2*1.27*0.4}{2}\bigg) \\ = 0.333 m²$ $\hspace{6cm}$ $\text{Trapezoidal portion} \\ V= \bigg(\dfrac{A1+A2}{2}\bigg) *H \\ = \bigg(\dfrac{0.38*0.48+1.2*1.37*0.5}{2}\bigg) \\ = 0.456 m²$

$\text{Rectangular portion} \\ = 1.2*1.27*0.15 \\ = 0.22 …